ESR115 Browser: Fullscreen YouTube playback makes all but the video stall

REPRODUCIBILITY: ~70%
OS VERSION: 5.2.0.16
HARDWARE: Jolla Phone 2026
UI LANGUAGE: Swedish
REGRESSION: Yes

DESCRIPTION:

Fullscreen YouTube playback makes all but the video stall.
Tapping the video to bring up the controls or the exit fullscreen button can take 30+ seconds to respond if it does at all.

PRECONDITIONS:

None

STEPS TO REPRODUCE:

  1. Start YouTube playback in fullscreen in the browser
  2. Let it play for a couple of minutes

EXPECTED RESULT:

On-screen controls (both webpage ones, and exit-fullscreen) can be brought up promptly.

ACTUAL RESULT:

Super-unresponsive interaction.

MODIFICATIONS:

picelsperpx=2.5, but i’m pretty sure it happened before that too.

ADDITIONAL INFORMATION:

Sensible video resolution like 360/480p.
It doesn’t happen quite always, but what feels like most of the time.
I have not had it resolve itself without me managing to navigate away or stop playback.

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