Breaking a stone/ore while falling crashes the game almost every single time. I successfully did the instabreak-while-falling trick once accidentally when I was descending down a ladder, but when I tried to reproduce it specifically on a ladder, it still crashes me (in fact: the crash log linked in the first sentence is the crash from the ladder attempt). Besides that one accident, it has crashed me every time.

I am using Forge 2088, Harvest Festival 0.5.1, Optifine HD U C3, and a modpack built off of All The Mods 1.10.2 v1.2.5.

It is possible that Harvest Festival 0.5.2 fixes this with the fix for the explosions crashing the game, but I do not know how to build the mod with the Gradle thing, and I figured I should post this anyways since the reason the game gives for the crash differs from the one in the explosion crash log.

Edit: I am playing in singleplayer, and the reason for the crash seems to be a singleplayer-specific issue since it's complaining about the difference between WorldClient and WorldServer