Why do videos stop playing when I change my volume?

About once a week or so, my phone will decide it wants to pause my videos when I adjust my volume on literally any app. Like I could be watching a snapchat video from a friend that you can only see once and if my sound isn’t on, I can’t turn it on or else the video will stop playing. After this has started, it won’t stop, in fact videos just will not play after this unless I restart my phone and sometimes even that does not work. I have the newest update and I take good care of my phone.

Please tell me I am not the only one.

Can anyone please help me with this issue?