I'm encountering a bit of an issue with mana tablets from botania interacting badly with the armourstand. When I have armour on the stand and open up the interface, one of the armour slots on the stand is outright replaced with a clone of the mana tablet in my inventory, deleting the piece of armour and resulting in a now duplicated mana tablet just sitting in a slot it can't even be put in normally.

I can't seem to replicate that. I'll need more info, possibly a screenshot?

http://i.imgur.com/wYMvwrS.png
I made sure to show the damage value of the mana tablet in case that's somewhat relevant, but you can see the mana tablet having replaced the chest armour as well as multiple copies of the tablet in my inventory

After trying some versions of Botania between 141 and 148, I've determined that the bug starts with build 144. I have not been able to figure out the cause through the commits.
Maybe @Vazkii has an idea?

I didn't really change anything regarding the tablet or mana handling code on 144. Not really sure what's happening here.

No idea either. Checked all my methods in the container, nothing indicated to be the source of the error.
I'll keep you posted but I don't know if I can find it.

I can replicate this:

Putting a ring of magnetization inside the armor stand, then having another player take it out replicates it. I don't think I can replicate this by myself, but I can take some screenshots on my side if you need me to.

Should be fixed in the newest release of Traveller's Gear: 1.14