I have been playing on the FTB Academy modpack on the official FTB launcher. It has been fine albeit difficult. I recently performed a test involving placing the contents of a Bucket of Water inside a Tinker's Construct smelter. After the water was removed I received an alert stating that the modpack experienced some problems. It did not crash. Ever since then certain items have not been functioning properly. The only one that I have noticed thus far was the Slime Boots. I am unable to bounce while they are equipped though fall damage is still negated. Is there anything that I can do about this?