https://imgur.com/tjvQ35J
Por favor ayudaaa

This isn't a Better Questing bug. Vanilla Minecraft does this sometimes when you reisize the screen during loading.

Entonces como la soluciono

I am really not the person to be asking nor is this the place for it. Unless it is specifically caused by Better Questing, you would have a better chance of asking elsewhere in the general Minecraft community. I'm barely getting by as is with Google Translate here.