Glitches / Artifacts in FCPX (luts)

Hi

i have big problem when aplying luts to my Sony A6300 or DJI footage. Its doesnt matter if its from Custom Luts in FCPX or 3rd party app. While editing its ok, after rendering whole project i see green, Purple or black squares 🤦‍♂️ After disabling effect everything its fine but not colored

im using Catalina system and update fcp. iMac 5K 2017, i7, 40gb ram, r580. Files are on extremalnie SSD over USB-c.

Im thinking to go back to os Mojave. Preferences was delated, render files after render to. Any sugestiom? Realy need help 😔