Random Text Coming Up On Screen

I have had this for a while, and I think now it's time to report it. I was joining my friends world, I then went to the end, then when I started moving around, random text was coming up on the screen. I asked my friend and he said he'd check on the internet after he tried it. After he got back he said that nothing like this had happened to anyone. I took a picture and sent it to the groupchat and my friend said that it was trying to tell me something. Now, this could be just because experiment was on, but I don't think that is the case, since it only happened to me. I hope this gets fixed soon because it interrupts my gameplay. PS I have the photo here.

-MadiTheWadi20