When CMO starts lagging , 3D usage in performance monitor drops down and Frame Time jumps from 20ms somewhere to 70-110ms

Just to be clear: The performance degradation happens only as long as the workshop tab is the active one? If you switch to another tab the problem goes away ?

Perfomance degradation starts only if Im scrolling in active workshop tab. If I scroll for around 20-40sec through the all mission from ...

Sorry I was on stable branch for a while, last night tested beta and it is still a problem in B1892

Nikel yeah from AMD overlay it look like GPU usage is lower.
Log

Something really strange is happening...

I uninstalled CMO, deleted everything and installed again, patched with 1852 and then 1859. When I start CMO, it works like it should. As long as I stay in scenarios tab, UI behaves normally and fast without any lag, same goes for scrolling down mission list ...

I have this problem too 9800X3D, loading of missions takes really long time and map panning smoothness and UI responsiveness is superslow. Problem persist even on 1859

This problem still present in public beta B1706. Played mission this morning and couldnt get behind Kiev, checked conditions in editor and sonars were operational. Downloaded fixed mission and completed in 5 minutes.