My mouse has occasionally a 3 to 5 seconds delay (but only while I´m playing, not when I´m in the menu). This only happens in Battlefield 1 and in a weaker version in Battlefront 2 open Beta and I had this problem for sometime now and I can´t find a solution. I tried changing my graphic setting, I tried using a different mouse or changing my mouse settings and I looked at different forums for a solution. But it seems like no one else has this kind of problem. First I thought it could be because of lag but its not, I can have 60 fps and still get occasionally a mouse delay. What special about it that it next to being delayed its also a little laggy but only the mouse movement but not the game it self. That means the game runs in 60 fps while my mouse next to being delayed also only running like with 50 fps it is extremely strange. I hope someone knows a solution for this problem.
Are you running the Win 10 CU update? I’m using a Corsair M65 Pro mouse & I had to re-install (driver and software) after updating to CU because I had huge lag on my mouse (most noticeable when dragging a window from one screen to another). Everything I checked looked fine, it wasn’t until I re-installed that it disappeared. Maybe worth a try.
Did you ever solve your problem? I have the same issue with Battlefield 5, the issue is coming and going. Had it a few weeks ago but it dissapeared by it self then it came back yesterday.