@sebastjava I am using the mute on the Strawberry icon on my toolbar. I think I saw someone else post about this same issue.
The skip doesn't happen here with a 10-second mute. I have to have it on mute for a few minutes at least. When it skips it sounds like it is playing the track very fast. It's unintelligible noise. Sometimes it skips only a short time and others it skips all the way to the end of the track. I can reproduce it at will. As far as I can recall, Strawberry has always done this on my system.
While playing with mute I noticed that it does not mute right away. Sometimes it takes 10 seconds or more for the sound to stop. I don't know why I never noticed that before.
I turned off the analyzer and played with mute some more. Sometimes when I mute the sound would stop right away and the slider at the bottom of the screen would stop moving. No way to tell if it was playing since it was muted. After I unmuted it didn't start playing again so I click the stop button and then play and it started to play again. Later I repeated the process but this time I went to do something else and after a short time It started playing.
This is that big of a deal. I have been living with it since I started using Strawberry. I and the other person that mentioned the skipping may be the only people using the mute switch.
Fedora Linux release 34