I have a BlackWidow v4 Mini with a Cobra Pro paired to it's dongle, and I'm experiencing random disconnects or "stuck" keys. The keyboard either stops working altogether for a second or two, or registers the last keypress as being held down even after the key is released.
I've also experienced RGB issues in which parts of the keyboard don't light up, and problems with Windows Dynamic Lighting in which either the keyboard or mouse don't light up when windows first boots.
Right now, I've tried just abot everything, including my previous laptop, removing Synapse, reinstalling Synapse, deleting all profiles, the reset button combination that's on the calibration page of the mouse, the reset button on the back of the keyboard, updating my router to the latest firmware, and I'm still having random problems.
Last night, I factory reset my peripherals from the ❓️ button in Synapse, and I deleted all my profiles to start fresh. I hope that this fixes it, but I'd still like to know if there's anything that I missed.