malfunction of razer synapse 4 after the update on 10/28/2026 | Razer Insider
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malfunction of razer synapse 4 after the update on 10/28/2026

  • Oct 29, 2026 5:33 AM UTC
  • 4 replies
  • 38 views
radioBarnRedsystem630

Subject: Razer Synapse 4 Bug — Unable to Reassign Mouse Buttons After October 28 Update

Hello Razer Support,

I am experiencing a problem with my Razer DeathAdder V2 X HyperSpeed after updating Razer Synapse 4 on October 28, 2026.

Synapse version: 4.0. [removed by moderator]

Two mouse buttons are affected:

* The side DPI button next to the left mouse button.
* The middle mouse button (mouse wheel click).

Both buttons are stuck on their default assignments. Whenever I try to assign a macro, a keyboard key, or any other action, Synapse automatically reverts the assignment to “Default.” I cannot save a different assignment.

I have already tried the following:

* Creating a new profile.
* Assigning keyboard keys instead of macros.
* Switching between 2.4 GHz wireless and Bluetooth modes.
* Restarting the computer.

None of these steps resolved the issue.

Everything worked correctly before October 28. The problem appeared suddenly on that date, so I suspect it may be a bug in the latest Synapse 4 update.

Could you please confirm whether this is a known issue and advise me on a workaround or let me know when a fix will be available?

Thank you for your help.

Best regards

    4 Replies

    Since it started right after the October 28 update and a new profile did not help, a clean reinstall of Synapse is worth trying, as leftover settings can keep the old assignments locked in. It may also help to test the mouse in wired mode if you can, to rule out a wireless profile sync issue. If the buttons still revert to default after that, sharing the exact Synapse build and whether the issue affects a second computer would help support confirm if this is a wider bug.

    greatPaleCeruleanx821

    Since it started right after the October 28 update and a new profile did not help, a clean reinstall of Synapse is worth trying, as leftover settings can keep the old assignments locked in. It may also help to test the mouse in wired mode if you can, to rule out a wireless profile sync issue. If the buttons still revert to default after that, sharing the exact Synapse build and whether the issue affects a second computer would help support confirm if this is a wider bug.

    none of this has helped at all

    • kwints28
    • Insider Mini
    • Oct 29, 2026 6:08 AM UTC

    This is a legit bug- new profile lets you remap those buttons - the min you map any other buttons it automatically reverts back to the default for those 2 buttons. This started immediately after the update on 10/28

      radioBarnRedsystem630

      The actions you suggested did not help, I will wait for a response from saport and the official bug fix.

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