Volume buttons doesn't change volume
Hi!
For several weeks now, I experience a problem with my iPhone. The volume buttons on the left side of the phone doesn't change the volume anymore.
Right before I want to listen to music, I want to make sure how loud the volume will be. Normally, I check this by pushing the volume buttons. The volume bar on the left side of the screen pops-up when I press the volume buttons but the volume itself doesn't change.
The problem fixes itself once music/audio starts to play.
I tried switching on/off the "Change with buttons"-button in the Ringer and Alerts setting, that didn't work. Also, I tried to restart the iPhone and recently installed a new update but that didn't change anything.
What can I do to resolve this problem?
Thanks!
iPhone XS, iOS 13