This is extremely frustrating. If I have a multicam sequence in the source monitor and have the source monitor display set to "Multi-Camera," I get extremely uneven playback in the timeline/record monitor. If I change the source display to "Composite Video," the timeline plays normally. I cannot be the only person to be experiencing this but I haven't seen anybody else mention this. I'm on an M1 Max Mac. It is extremely annoying to have to change this every single time after I edit a multicam clip into a sequence.