When I use the webbrowser inside HereSphere on my Quest 2, any kind of media plays in slowmotion. Like the speed was set to x0.25, but in a stuttering way. This happens to Youtube, Spotify, and every other kind of playable audio/video I have tested. It used to work perfectly fine before.

To solve it, I've already tried to reinstall HereSphere fresh, but it didn't help. When I play media in de Meta Quest Browser, it works fine.

How can I proceed solving this issue?

Which Quest OS version are you on? HereSphere uses webview (which is provided by the Quest Android OS). Could be the webview on your Quest 2 is messed up. Maybe a factory reset will help. I tested on my Quest 2 (using both v57 and v59) and youtube videos play fine.

I've also encountered this issue. Currently, I'm using the Quest 2 with system version 68, and reinstalling the software doesn't seem to help. However, the Meta browser and other video playback software are functioning without any problems. Visually, I can't tell that the video is playing in slow motion, but the audio sounds like it's slowed down, making it difficult to understand what's being said.

Another issue I've encountered is that browsers using the Google kernel for sideloading (such as Edge, Brave, and Chrome) produce a kind of crackling noise reminiscent of electrical current, whereas browsers using the Firefox kernel do not exhibit this problem.