While playing on the server, I noticed one strange thing - under certain conditions, the player can run through the air, as if on a material block. This happens when cursor is slightly higher and does not move while moving.

        I tested it in 4 versions of Minecraft (single player) + 21w03a in Survival. I don't know if this should be considered a bug or is it just a feature of the game 

        My version: I assume this is because the player's hitbox cross the chasm before the so-called "tick check" is done.

Video 1.7.10, 1.12.2, 1.14.4, 1.16.5 & 21w03a testing: https://youtu.be/9APU1ThqdGk