1.16 although brings some awesome features, there is a bug I want to talk about. If you do a /locatebiome command in the nether, for example /locatebiome crimson_forest, and you decide to click the coordinates and teleport there, some issues come up, namely
1. You get teleported into a block and suffocate
2. The y-level is completely off. I had to fill in a 20 by 20 by 20 area of TNT and blew the entire thing up to finally reach the "open" area of the Crimson Forest. It was very annoying, especially the computer lagging.

(P.S. Please refer to https://bugs.mojang.com/browse/MC-172251?filter=-5 for another possible glitch. Thanks!)