Thank you all for all of your insights Especially IdentitY your suggestion actually worked and i realized all i had to do was have live split open before i launch the game thank you for helping me with this problem

after one of my friends got me into Human Fall Flat speedruning i have been enjoying it but i came across an issue this morning when the live split auto splitter stopped working and turning it on would also cause extreme lag but only for live split, i don't really know how to fix this issue and searching for answers online provided nothing. So does anyone know how to fix this?