Would you be able to grab a DxDiag for me so I can take a look? For more info on how you can find it check out the EA Help article on gathering system info.
Once you have the document you can attach it here.
/Kent
Thanks! Looking at the DxDiag you sent us it looks like you're using a ROG Gladius II. Do you currently have a specific software installed for that mouse? If so, I'm wondering if there might be an issue with the driver. Since it sounds like your sensitivity is changing constantly it may be something going on with the driver.
When you're able can you try uninstalling and reinstalling the ROG mouse software to see if that helps at all?
/Kent
devtrackers.gg
Keep me updated if anything changes.