When I use mp4 grain footage as overlay (blend mode - no mater which one), playback and whole performance immediately slows down (one frame is rendered about 10 seconds). Also render takes unrealistic amount of time with CPU usage about 30%. I never had this issue before upgrade, so I downgraded for previous version and problem is gone. Please, fix it.

Win10 64bit, i5-9600K, GTX1660Ti, 32GB RAM