Problem: So... My chunks will like spazz out, yeah Error report: lol, I don't understand this stuff XD Picture of problem: (If visible) It's weird, they aren't completely unloaded all the time. Like sometimes they'll just appear and re-appear like 5 times a second and it's getting annoying af. SOS I'll GIVE YOU COOKIES
I have this issue sometimes as well, what I do to fix it is turn down my render distance all the way.
Hm, just change the version of the game you're on, it's a corrupted thing about either the version of the game client or optifine.
Don't bother reinstall or nothing. Change your video settings to what you norm have but make sure optifind vbdos off or in norm mc turn render down