Hello.
Can you try with a different mouse and let us know if the issue occurs with it as well?

Also do you have any sort of additional controller that is connected to your PC?

If so, try to disconnect it

i dont have anything else attached and ive already tried it with a different mouse

ive tried all your suggestions it still does it @I909

Can you provide a dxdiag file from your computer?

what is that?

You can open and use the DirectX Diagnostic Tool (dxdiag) by pressing the Windows Key + R, typing dxdiag into the Run box, and pressing Enter.

How to Open DxDiag

1. Press the Windows Key + R on your keyboard to open the Run window.

2. Type dxdiag into the text field.

3. Press Enter or click OK.

4. If prompted to check if your drivers are digitally signed, click Yes.
   
   How to Save and Share a Report

   1. Wait for the green progress bar at the bottom of the tool to finish.

   2. Click the Save All Information... button at the bottom.

   3. Choose a location like your Desktop and save the file as a text document (.txt).

   4. You can now attach this text file to support tickets or tech forums.

I'm just gonna chime in here on two potential causes:
1) Deadzone in your desk (unrelated to Reforger, but would explain the issue persisting for two mice if wireless)

2) BattleEye conflict w/ mouse driver (related to Reforger, but would only explain the issue persisting for two mice if they are of the same brand. I had a somewhat similar issue w/ my Netgear wifi adapter causing the blue screen of death whenever I booted up Reforger. Best to completely delete and reinstall your device driver)