Synapse for Windows - V4.0.86.2605261036 / Chroma for Windows - V4.0.63.2605250927
RELEASE NOTES
4 JUNE 2026
- Razer Kraken Kitty V2 BT - Detection, lighting, UI issues
- Other minor UI bugs
PREVIOUS RELEASE NOTES
25 MAY 2026
- Stability & Reliability
- App Launch & Crashes
- Synapse could fail to launch after updating from an older version
- App could display a blank screen with persistent loading icons at launch
- Crash when switching between Audio Mixer tabs while playing music
- Chroma App could get stuck in a "Downloading" state and fail to update
- Keyboards became non-functional after closing Synapse via Task Manager
- Installation & Uninstallation
- Certain devices could fail to install, showing "detecting devices" indefinitely when multiple peripherals were connected
- RGUpdateInstaller component was not removed automatically when uninstalling Synapse and Chroma App
- Device installation page could disappear mid-install for certain wireless mice, preventing setup from completing
- Synapse could fail to install on certain system configurations
- App Launch & Crashes
- Device Detection & Connectivity
- Devices could appear duplicated in the Devices & Modules list during driver installation or after disconnecting
- Certain wireless mice were not detected by Synapse when connected via dongle
- Special-edition devices appeared as base models when installed while the device was powered off — the correct edition now displays once the device wakes up
- Certain laptops showed as "HID Keyboard Device" in Device Manager after installing Synapse
- Keyboards could become non-functional after initial driver installation until a system restart
- Synapse incorrectly prompted for a system restart after installing drivers alongside another peripheral
- Chroma RGB
- Brightness Controls
- Adjusting the brightness slider did not reflect on the physical device
- Brightness slider changes did not persist after refreshing the page
- Default brightness toggle incorrectly displayed as OFF for certain wireless mice (Bluetooth mode)
- On laptops, the asterisk brightness indicator was missing when the Plugged In / On Battery link was toggled above 80%
- Device lighting could randomly stop responding to adjustments
- Lighting Effects
- Switching between lighting effects caused noticeable lag on certain keyboards
- Chroma Studio did not display certain wireless mice connected via Bluetooth
- Lighting effects could stutter or flicker persistently when Synapse was opened
- Audio Meter effect was missing from Quick Effects for certain peripherals
- Windows Dynamic Lighting (WDL)
- Certain mice were incorrectly identified as WDL-compatible devices
- Device brightness remained adjustable while set to WDL mode (the panel should be fully greyed out)
- WDL tooltip was truncated on the Chroma App dashboard
- Chroma App
- Lighting icon was displayed incorrectly for certain peripherals in Chroma App
- Module tile titles in Chroma were not aligned with their Synapse counterparts
- Chroma tutorial button displayed "Install" instead of "Start Tour" after clearing cache, even when already installed
- Brightness Controls
- Key Mapping & Customization
- Button Remapping
- Keyboard-function assignments on mouse buttons did not work for certain wireless mice
- Remapped buttons on M1–M5 appeared on unintended buttons on certain keyboards
- The \ key was incorrectly recorded as the number 3 during Macro recording
- Assigned button functions did not work on certain mice connected via Bluetooth
- Hypershift
- Key output remained active after releasing the Razer Hypershift button
- HyperShift-bound keys did not work for certain mice
- On laptops, the F key was pre-assigned to "Toggle Fan Speed Mode" in Hypershift by default, even without an eGPU connected
- Macros
- On-The-Fly Macros (OTFM) could be incorrectly assigned to the Multi-Functional Button via double/triple tap
- "Play while assigned key is pressed" option was missing for macro-assigned sensitivity cycle buttons on certain mice
- Scroll left/right macro keybinds incorrectly displayed as scroll up/down
- Macro keybind tooltip appeared misaligned for the Multi-Functional Button
- Global Shortcuts
- Global Shortcuts did not trigger on the first attempt after creation
- Device profile dropdown in Global Shortcuts was sorted in descending order instead of ascending
- Gaming Mode
- Gaming Mode could be toggled via FN+F10 even when "Apply in-game only" was enabled
- Snap Tap & Actuation
- Snap Tap settings were not retained after closing and reopening Synapse
- Snap Tap settings carried over to newly created profiles instead of reverting to defaults
- AI Launcher
- AI Launcher option was missing from the key assignment panel on certain keyboards and mice
- "Launch Windows Copilot" was missing from the Windows Shortcuts key assignment list
- Button Remapping
- Audio & Sound
- THX Spatial Audio
- THX Spatial Audio settings reverted to Stereo upon PC restart for certain headsets
- Manually adding a game to the THX game list did not work on Windows 11
- Equalizer (EQ)
- "Synapse Required" label was missing when adjusting non-custom EQ presets
- EQ name notification was missing when switching EQ modes via the headset's physical button
- Sensa HD (Haptics)
- Haptic feedback was lost after power-cycling the device while Synapse was running — previously required an app restart to recover
- Sensa HD game icons displayed incorrectly when playing supported games
- Updated Sensa Mixer UI was not applied
- Audio-to-Haptic (A2H) profile incorrectly showed as "disabled" on the dashboard even when enabled
- Microphone
- Mic enhancement tooltip displayed incorrect information on certain headsets
- THX Spatial Audio
- Performance & Hardware Controls
- DPI & Polling Rate
- DPI changes did not apply on certain wireless mice connected via Bluetooth
- Polling rate values became incorrect after waking from sleep — e.g., a 1000 Hz setting could revert to 8000 Hz
- Higher polling rate options (2000/4000 Hz) could not be selected on certain keyboards after system wake
- Volume & Media Controls
- Press-and-hold on dedicated volume buttons did not continuously adjust volume when Synapse was running
- Command Dial Track Selector and Skip/Backwards media keys did not work in Chrome when Synapse was active
- Laptop Performance (Blade series)
- GPU temperature/power color bar displayed red even at low loads (incorrect thresholds)
- Laptops with a single fan incorrectly showed two fan RPM readings
- Hyperboost mode UI displayed incorrectly on the Performance tab
- Fan control UI was cut off and could not be fully scrolled
- DPI & Polling Rate
- Profiles & Settings
- Mouse cursor jumped to a different position when switching profiles via a mouse button
- Game-linked profiles reverted to default after some time
- Profiles exported from Synapse 3 could not be imported into Synapse 4 (showing a "corrupted file" error)
- Cloud sync prompts incorrectly appeared in Guest mode
- Auto-Launch checkbox setting did not save after refreshing
- Chroma lighting settings (Advanced Effects) reverted to defaults after PC restart on certain headsets
- Low battery notification appeared even when the device was powered off
- UI/UX
- Keyboard layout button highlights were misaligned for certain regional variants (e.g., JP, TUR layouts)
- Device image was missing from the dashboard for certain keyboards
- Firmware version was not displayed on the help page for certain wireless mice (Bluetooth mode)
- Grey-out overlay overlapped with profile options when plugging in a USB headphone on laptops
- Devices were not shown in the navigation dropdown while viewing the device tab on certain laptops
- Tutorial video skipped the hotkey information for the Factory Default profile on certain keyboards
- Chroma Connect did not sync colors correctly on startup for certain third-party integrations
- Localization
- Haptic Intensity tooltip was not localized in Chinese, Japanese, and Korean
- Breathing effect "Random color" and "Smart dimming" labels were not localized in the Lighting tab
- Custom Mode OSD notification did not capitalize the first letter in Spanish and French
- Equalizer Adjustment widget labels (Low/Mid/High) were not localized
- "Pairing Failed" error message was not localized in non-English languages
- Chroma App Release Notes were not localized in any non-English language
- Snap Tap, Rapid Trigger, and Continuous Rapid Trigger names were being translated — these now remain in English as brand terms across all languages
- Updated Philips Hue libraries
- Updated THX driver v3.2.3
- Razer Nari Ultimate
- Razer Nari
- Razer Nari Essential
- Razer Kraken V3 HyperSense
- Razer Barracuda Pro
- Razer Kraken Kitty V2 Pro
- Razer Kraken V3
- Razer BlackShark V2 Hyperspeed
- Razer Barracuda
