I play on 1.12.2 Forge 14.23.5.2860.
After I updated LittleTiles to 1.5.61 I noticed an issue. 'Little Hammer' doesn't work. It just didn't anything when I tried to break tiles. I check the configuration and the checkmakr on 'any' was set. I have no idea why is this a thing. Everything was fine in a version before. My mods never conflicted.

My config:
Intel Core i3-2350M 2.30GHz
GeForce GT 520MX
RAM: 4 GB
64 bits OS

Edited: Yeah, I found the reason. It was all 'MoreCommands' mod somehow messing it up