Running AOF6 server latest version (0.1.4) and 2 of us seem to be unable to attack mobs at random points when playing. Any suggestions of how to fix?

FTBChunks was affected in this update, any chance it happens when inside claimed chunks? Nothing else changed in this update that would affect that kind of thing afaik.

FTB chunks was not changed. giving a block a tag is not going to do that. There have been some instances of this reported before, but not sure how to reproduce to debug it.

Do any of you two recall what you were doing when this started happening?

I am now having the same bug, it just happened out of the blue, my friend is still able to attack whilst I am unable to attack or even shoot a bow.