Falling block does not fall if player put torch(or like that) fast.
Here is the link of the video what it happens : https://clips.twitch.tv/VictoriousOilyLardSwiftRage
Environment
Saw that bug at Intel Core i7-8770k / DDR3 16GB ram, (Do not know windows ver.) 64-bit, Java for 64-bit, GTX1070 GPU
WAI.