I posted that on the 3.3.6.0b thread. I never saw a 3.3.5, so I was on 3.3.4 until that (.6). Here’s what I said, and a link. BTW: It’s still happening on 3.4.0.1 alpha. Thanks for looking into it.
When getting to the 2nd to last frame in the preview, the cursor stays there and there is a > 30second wait for that last frame and the preview to start playing.