Youtube and Youtube Music seeking in Media player is not synced

[Leblayd]

Captchas

• I have read the instructions.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.
• I have checked that this issue cannot be reproduced on Mozilla Firefox.
• I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

[This is the re-opened issue #6685, as per the bot's instructions.]

The new Media player controller works fine on Spotify, for example, but it has minor issues on:

Youtube Music:
I can click to seek in the music without problem. But the issue is that it is not shown either in the seekbar or the time. And even after that, it jumps back to the place before seeking when I pause and unpause, and when I mute and unmute it.
Also, it did work out one time where it randomly fixed itself after a 5 second delay.
Here is an example video (no sound; but the music itself seeks fine, the bar is simply not in sync)

Youtube
When seeking, it takes a second or two to actually load and buffer the video and resume playing. However, the seekbar and timer thinks it's immediately playing, desyncing the two.
Pause and resume fixes this consistently.
I assume this problem exists with every service, it just isn't visible with music for its sheer speed.

(In addition I think the seekbar's hitbox is insanely small. It literally seems like 1 pixel. But I'm aware this is an entirely separate issue)

Version

1.10.3b

What platform are you seeing the problem on?

Linux (Flatpak)

What component is this issue related to?

Media Controler

Relevant log output if applicable

[Propheticus]

Can you confirm this is still valid in v1.11.1b?

I can't replicate multiple second of mismatch. I do see a 1 second (rounding / off-by-one error?) difference that's in line with the picture-in-picture feature's seekbar timer:

[Leblayd]

The Youtube Music issue is not solved, it hasn't changed at all.

However the Youtube part is fixed. Of course, it's 0.5 second late for me too.
What was not okay, was that if seeking took 10 seconds before, it'd be 10 seconds late. Now, it jumps back as soon as it gets the video resumes, which is how most of these media controllers work in my experience.