This is a very unique issue and unfortunately it’s not likely to be something we can reproduce on our end.
Do you have another mouse you could try with?
Also, try a ‘Selective Startup’ to rule out any background applications interfering with your input:
- Press the Windows key
- Type ‘msconfig’ and select ‘System Configuration’
- On the ‘General’ tab, select ‘Selective Startup’
- Deselect ‘Load Startup Items’
- Reboot your PC
- Launch as normal, and see if the issue persists