I am getting rainbow-textured blocks on occasion. I will be playing a game of Survival Games with my buddy, and all of a sudden, this happens and it screws me up and I die. It has gotten more extreme, once to the point that every block completely disappeared, causing me to die. Other times stone will turn into a sideways furnace and doors will be made out of obsidian, etc. I was only able to capture the rainbow phenomenon via screenshot. As you can see, it occurs with both a different resource pack and vanilla.
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Might be a server issue. Does this occur in Singleplayer or on any other servers?

Thank you for your report.
However, your ticket has been resolved as invalid.
This ticket relates to a modified or 3rd party client, server, or launcher.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
This site is for addressing issues related to the base unmodded Minecraft; Bukkit, Forge, Optifine, modded servers such as The Hive, Overcast, Showbot, Hypixel or any other modded system invalidates your ticket, unless the behavior can be reproduced in Vanilla.
Additionally, if you have problems on large-scale modded servers, please report it to their site. It's probably not a bug in Vanilla Minecraft.
:info: If you are able to reproduce your issue in a vanilla environment, feel free to create a new ticket.

I am getting it to reproduce in vanilla, but not long enough to get a screenshot. I might be a bit.

Now it is giving me surges where chunks go a tad crazy. I have tried my best to screenshot it but they go too fast. I will be loading new chunks and suddenly a bunch of them will become invisible for a split second, become visible, and then it will happen to another, then another.