Got a few more hours without the bug but unfortunately it came back eventually so i'm scratching the sound driver off my list.
It seems the more i play on Fast Forward the faster the bug occurs.
I just find it very odd that the bug will stop when opening different UI elements, like how does opening the camera control tab affect this? When i want to push through and continue playing i just end up switching between the Notifications tab and Camera control tabs each time i go from build to live mode. To me it sounds like some sort of UI bug but if that were the case surely more people would be experiencing this. Maybe it's a cache thing, though deleting the various cache files doesn't do anything. Back to the drawing board.
And thanks for the help puzzlez, appreciate it.
@Gummingtons I know I'm quite late but I've been having this problem since a long time now, maybe a year or more and since I use A LOT of mods I thought they were the issue so I tried fixing my game alone, not even checking to see if other people had that problem, until today. I do think a lot more of us have this exact same bug but don't talk about it if they're in the same situation as me as mods are often buggy and/or require updates to not bug out your game. My lag tho extended to a point where even if I didn't go into build mode, it would lag anyways and openning any UI interface wouldn't fix it. So I did a huge cleaning in my mods and it seemed to have worked but then I got in build mode and it's here all over again. The only thing I can think of is my lot inventory which I have no idea why is full of all the furnitures I specifically sold when moving out of previous houses. Everytime I try to sell an item from the inventory my FPS drops as if I was playing on a 2011 computer and it actually takes a genuine 3 seconds before the item is sold and of course we cant select multiple objects so I'm slowly trying to get rid of everything and see if that's what's causing the build mode to lag, maybe there is too much to load and the game isn't appreciative of it, I'll update if anyone is still having this bug and still looking for a fix.
Edit : it did NOT work ☹️
