Glitch when I create a world.

So whenever I try to create a world it all goes smoothly until I click or accidentally click the  behavior or resource pack tabs. My entire Minecraft will glitch and I have had to restart my iPad a few times. This also happed after I updated Minecraft to the new version. This happened on my computer (also bedrock) and it went away within a day. It has already been a week or two since it started. Like the music keeps going too.

 

so here's the video link

https://share.icloud.com/photos/011mynDiEs8FfxncV_3b2dVSQ