Problems with mouse

It isn't problem with sensivity, but with strange moves. In the main menu, mouse moves are normal, but when i'm in the game, even when I very fast move my mouse, mouse moves are very slow and when I stop mouse, suddenly mouse moves ar very fast and moves
stop

Surface is good, because in the Warframe(another game with mouse nad keyboard support) mouse works well and in the main menu Fortnite mouse works well too, this problem is in the match only.

Ok guys, thanks for help. Everyting is know. My mouse hiro octagon is bad for fortnite. When i tested another mouse, it works. I reported problrm with mouse Hiro Octagon and i will wait for resolve of this problem.

I appreciate your quick response!

If you can't move the mouse on another PC as well, there's a high possibility that the problem is with the mouse.

Is it possible to borrow a USB mouse from a friend, just to test it on your PC? If the mouse works completely, unfortunately, you will have to replace the faulty mouse.

Hoping that everything works out for the best.

I hope I helped you. Hugs!

I'm not a big fan of Mouse and Keyboard support for consoles but i don't have a problem with it if games keep Mouse and Keyboard users and Controllers users separate, as Mouse and Keyboard users have a huge clear advantage over Controller users.