[4.2.0.21] [X10 II] Video player overlay missing from videos

REPRODUCIBILITY (% or how often): 100%
BUILD ID = OS VERSION (Settings > About product): 4.2.0.21
HARDWARE (XA2, X10, X10 II, …): X10 II
UI LANGUAGE: English
REGRESSION: (compared to previous public release: Yes, No, ?): No

DESCRIPTION:

The overlay (play/pause, seek bar) is missing in the video player when opening a video with the file manager

PRECONDITIONS:

none

STEPS TO REPRODUCE:

  1. open a video in the file manager
  2. gallery app opens
  3. overlay (seek bar etc.) is briefly visible, then disappears

EXPECTED RESULT:

being able to open the overlay by tapping on the screen, pause / play and skipping through the video with it

ACTUAL RESULT:

overlay not showing when tapping

ADDITIONAL INFORMATION:

I couldn’t find any entries in journalctl related to this issue.