Mouse input intermittently stops after ~1 hour in-match (controller OK)

 I launch Battlefield 6 from Steam. For the first half hour everything feels fine. The weird part is that around the 30–60 minute mark, my mouse suddenly stops responding: no camera movement, some clicks are ignored for a few seconds, while keyboard and controller still work. Alt-Tabbing or restarting the game temporarily restores control—until it happens again.

I started with the mouse. I use a Razer DeathAdder V3 Pro. I switched from 2.4G to wired, lowered polling from 1000 Hz to 500 Hz, turned Motion Sync off, reset surface calibration, and even exited Synapse to use onboard settings only. The issue persisted.

Then I suspected a controller takeover. I checked joy.cpl and initially saw an “Xbox 360 controller (not connected)”. I cleaned related Xbox 360 / XInput HID entries in Device Manager. After that, joy.cpl was completely empty—no game controllers enumerated. To be safe I set Steam Input = Disabled for this title and turned EA in-game overlay off. That session lasted longer before the problem reappeared, but it still happened: the camera froze again for a few seconds.

To rule out USB dropouts, I kept USBLogView running during a full match. When the problem hit, there were no disconnect/reconnect events for the mouse or dongle. 

I tried a few more things:

• Clean-installed a stable GPU driver with DDU; disabled Low-Latency Ultra, Highlights, and all background recording;
• Added Battlefield/EA folders to Defender exclusions;
• Closed anything that acts on a schedule (cloud sync, RGB, monitoring);
• Locked the game to exclusive fullscreen with a stable FPS cap; Raw Input On, Mouse Smoothing Off.

These steps made the problem less frequent and later to appear, but it still occurs occasionally. At this point I’m confident about two things:

• Not a mouse hardware fault (other titles are fine; the same mouse is fine for a long time on this PC);
• Not a USB disconnect (logs show no device events)