Is your Java up to date?

Have you tried deleting the cache?

Can you tell me where it crashes? Are you in-game playing? Does it crash when you try to minimize it? Does it crash when you're teleporting to a new area?

What OS are you using? (Windows, Linux, Mac?) Can you type ::openglinfo while you're playing and make a screenshot of the popup?

I have not tried to delete the cache, im using Windows, and i thought it only happend when i opened it with "OpenGL", and i had it minimized while playing, but for some reason everything is ok again it seems.
Thanks for the response and sorry for the trouble 

It may be that one of my updates has fixed the issue. If it happens again, please make another topic here. Thanks a lot for your bug report.