Losing burrowing claws because of Chimera body parts

[Former user]

I was playing a character using Burrowing Claws as my primary attack, and i had the chimera mutation. When I leveled up, i chose to get a new mutation, and I picked the one that would make me grow a new body part (it was Wings that got the extra body part that time). I grew a hand out of my right hand (a right hand-hand). Afterwards, I checked my equipment, and my NEW right hand had burrowing claws, but my normal left arm/hand had LOST burrowing claws. also multiple arms mutation doesn't receive burrowing claws if both are picked at character creation, which strikes me as an oversight.

[Jake Hanson]

I am the op of this report, and i just experienced the same bug again: i chose a mutation (freezing hands this time) that would give me a new body part, and grew a bine out of my back, and the bine received the burrowing claws but i lost them again on my left hand.