When I run a new technic pack survival mode world, i can play for a few hours, and then by it self the inventory goes weird and I can't place stuff in the hotkeys, they just goes automaticly up to the crafting slots, so basically, i can't play at all when this happens.
I tried deleting the .jar file this didn't help and I have tried making a new world, but the same thing happens after a few hours of playing.
can anyone help me?