Secondary track slips sync when scrubbing/blending with Primary

Is this a known thing? Haven’t found a thread. 2023.2 in Mac, conforming edit, uncached media, when I scrub in the timeline the Secondary sometimes slips sync a frame or two, making me think my conform is off, but it is fine if I frame through.

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It’s been doing this for a version or so at least, it feels like some sort of frame buffer takes a sec to catch up.

So it’s a known thing for me at least.

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It’s like a delay. The timeline doesn’t finish updating until you release the pen. I can see it using difference mode. My advice is to use the cursor key, and keep pressing to move forward. The scrub bar doesn’t go to the next frame until the refresh ends. It is slower, about 60% of normal playback speed. It’s enough for my technical checks.

I can’t say how long this has been going on.

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It’s done that since before the pandemic at least. It’s worse when working uncached. If you stop scrubbing, it’ll catch up.

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I could swear I saw it on Linux a few years ago too. But haven’t noticed it till today on Mac

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When I’ve seen it happen it has been because I hadn’t cached everything. Pulling the offline in locally (cache it) has usually fixed it and allowed it to all stay in sync.
Might be the challenge of looking at sequences in the Primary and a mov in the Secondary over the network whilst still keeping them in sync?

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I think this is caused by the ref clip not being the same res as whatever your primary track is? It used to be fine on older versions so it’s very frustrating it doesn’t work anymore.