Flashing chunks glitch

Hello everyone, I was getting these chunk errors. It's flashing and it's very annoying..

I have also OptiFine, but I red on reddit that the chunk loading option was removed(to change to multi-core and that)...

There's any solutions?
Thanks in advance!

Here there's also takes of me playing block hunt while i was having these problems

(sorry if i have bad grammar, i'm spanish)
https://www.youtube.com/watch?v=cbXTctu_-9c