If I return to the screen, the slider position also still stays at this position. However the progress (time past) of the slider is at 01:28 of 9:56 (should be at the beginning, not in the middle).
Issue 1 is normal and always was to avoid delay in normal seeking, it’s just more visible due to issue 2. (The dialog shows the actual current time not where you randomly long pressed).
Issue 2 Is a Google issue that I was able to repro will workaround.
Expected:
On hold on slider → release finger (without jumping video) OR dialog appears / close dialog (without jumping) → slider progress is corrected (depending on the video time - currently it is wrong, it stays at the on-hold position).
Since I have a hard to time to explain, example:
progress of video at 20%: |—o--------------|
on hold in the middle of the slider, then it looks like this: |---------o----------|
after coming back from dialog OR after releasing the on hold, it should go back to the correct time/progress of video (20%): |—o--------------|