When crafting something in a blood altar, and quitting then re- joining the world, some progress will be reverted(Not like it ran out of LP, closer to "The progress never happened"). The progress lost can be several seconds worth, and while it seems no LP is lost due to this it might be worth trying to fix.

Tested using BM V1.1.0 in MC 1.7.2

I think this issue is because the game hasn't actually saved for those few seconds. The game only saves when you go to the pause menu, and it might be that you were quitting too quickly for the game to save the block's state. Also since this doesn't cause any lost progress, I am thinking it is just a game, and not mod, related issue!