If you use a piston to push/pull a piston the game just completely crashes crash log: https://pastebin.com/j9KUdYN6

Cannot reproduce. Could you show me the setup you've built?

try making a simple slime machine dude, it dies instantly

Still can't reproduce. What kind of machine are you making?

how the... it does not work for us but for u? i am confused

Try this update? https://www.curseforge.com/minecraft/mc-mods/piston-control/files/3013495

Source block type: ID #minecraft:observer (block.minecraft.observer // net.minecraft.class_2426)
Block: Block{minecraft:piston}[extended=false,facing=east]
Block location: World: (-13,57,4), Chunk: (at 3,3,4 in -1,0; contains blocks -16,0,0 to -1,255,15), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Stacktrace:
at net.minecraft.class_1937.method_8492(class_1937.java:408)
at net.minecraft.class_1937.method_8508(class_1937.java:388)
at net.minecraft.class_2426.method_10365(class_2426.java:73)
at net.minecraft.class_2426.method_9588(class_2426.java:50)
at net.minecraft.class_4970$class_4971.method_26192(class_4970.java:873)
at net.minecraft.class_3218.method_14189(class_3218.java:596)
at net.minecraft.class_3218$$Lambda$4879/209326619.accept(Unknown Source)

-- Block being ticked --
Details:
Block location: World: (-12,58,4), Chunk: (at 4,3,4 in -1,0; contains blocks -16,0,0 to -1,255,15), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
hmmm

it was the observer????

Ah it seems to be a confliction with another mod

its with almost every mod...