stuttering

I have been getting this bug since the 1.5 update. When I load up the game and walk around my farm, I get frame drops and stuttering. When I reload the game the stuttering sometimes stops. If you look in the very top right hand corner of my screen, you can see the frames drop from 60 to 56 here...

So overnight, my original save file that I play now stutters at intervals of 2 seconds during gameplay. Does not happen with any other save files, including those that use the Immersive Farm 2 map. Last time this occurred, one of the Cask mods was causing the game to stutter because of an...