Timeline lagging only when Source panel is open

[joshs17272336]

My timeline playback is extremely choppy using lowest playback resolution and ProRes proxies but only when the source panel is open with clips in preview. If i navigate out of the source panel to, let's sayc "Effect Controls", then timeline playback is perfectly smooth. I have a 2020 macbook pro with 16gb ram and quad core i5. The footage is R3D 5k. 

[Carlos Ziade]

did you try to reset the preferences?

I guess this kind of footage needs more specs...

what if you try with smaller formats like any HD video

that you can try for testing?

[Kevin-Monahan]

Hey Josh,

Any other hardware attached, monitors, eGPUs or anything?

Thanks,
Kevin