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.
Yes, I've had this issue as well. Actually a ton of bugs in multicam mode (V23.1.0). I'm having trouble trimming multicam clips, it changes to composite mode by itself sometimes, and effects won't show in certain nested multicam sequences. Extremely frustrating. Somehow worse than in Premiere 2022. I'm on a M1 Max myself.