Full screen mobile issues

I watch in Google Chrome on mobile. It used to be that when I went to full screen I could double tap my actual phone screen and the seek bar for the video on the bottom would disappear.

Now the seek bar won’t go away when I double tap my screen. Instead it tries to fast forward or rewind the video 10 seconds depending on which side of the screen I tap on just like a video would on the regular YouTube mobile app.

It seems to be more of a glitch than a feature because if you jump 10 seconds, watch2gether just syncs back to where everyone else is after a second. I don’t care about that aspect though. I just want to be able to hide the seek bar in full screen again. Can you look into this for me please?