Timeline start work slower

Hi guys)

I have start having problem with Timeline. I usually use proxy file for multicam editing. Maybe month ago it was work perfect. After last update start working very slow. Sometimes even freeze. 

Here is my PC info:
Intel® Core™ i9-10940X 14-cores 19.25M Cache, 3.30 GHz

MSI RTX 3090

32Gb RAM

4x NVMe drives 3.7Gb/s