[Bug]: my game starts graphically lagging after I am playing for a while

Version of OpenTTD

15.2, MacOS Tahoe 26.1

Expected result

The mouse runs smoothly the entire game and the graphics fps runs on a solid 60 fps.

Actual result

Moving the mouse and camera POV becomes laggy and choppy after an unknown amount of time that the game has been open(or some unknown thing triggers it that I don't know about)

The fps graphics in the fps also says it drops down to roughly 30fps(but seems to change a lot depending on how fast I'm moving the mouse/camera) but it doesn't seem to affect the game fps nor do i notice anything else lagging(to my knowledge)

Steps to reproduce

1. Play a game
2. (maybe i accidentally do something that breaks it?)
3. Keep playing the game normally for like a while
4. the mouse starts becoming noticeably choppy and annoying to use.