Blueprint in the sequencer and viewport is partially invisible

Hey guys! Please tell me if anyone has encountered this problem. The character is assembled in parts via blueprint. When you load it into the sequencer and hook the animation, then when playing and rendering the body parts disappear in some frames. This always happens in different ways.
Increased Bounds Scale parameter - partly helps, but then the shadows get smeared. What to do in this situation?
I didn’t have such problems with skeleton mesh, but I have to use blueprint characters in the project.