Sims 4 huge fps drop and lag after introducing the last event

After the last "Forever Friends" event and memory boost option introduced, the Sims 4 started to lag very often and drop fps, it is almost the same in new save and old saves. I tested it without any mods, with only cc, and with minimnal mods (only MCCC, updated), the lag is still there.
My specs are supposed to be more than enough to run the game, and i used to play in ultra graphic without any lag before. Nothing seems to help. I own almost every DLC (except Enchanted by nature, Adventure Awaits and Batuu). I noticed that even without mods (and with Memory boost) game uses 11GB of RAM which is a lot. It seems that to play the game with all DLC and some mods smoothly I need to update RAM to 32, which is crazy for Sims.

My specs

Processor Intel Core i7-107 10U CPU
NVIDIA Geforce GTX 1650 with Max Q Design (updated drivers)
RAM 16GM
SSD 476.9 GB