Black block glitch

Hello Minecraft. Today I'm reporting a bug called "Black Block Glitch". I know you guys may already heard it before and you guys fixed it already and now I have it again. Can you guys fix it again? I hope you guys will fix it because I have a YouTube Channel that's about me playing Minecraft and Roblox. But now there's this bug, how am I supposed to make a video about Minecraft now? No offense. I you are reading this,please fix it as fast as you could thank you.