Morphing artifact spawns borer fleshhook when attempting to morph into a borer, leaving a verb holder when turned back

[StreptoMutans]

Description of issue

I was a Xenoarch and dug up a nice morphing artifact activated by atmos. It turned me into different things perfectly fine

07:02:54]ACCESS: Logout: no key/(oil slime (515)) (Anomalous Materials Lab - 281,304,5) [07:02:54]ACCESS: Login: StreptoMutans/(Ezra Baum) from [NOPE] || BYOND v511

but then it tried to morph me into a borer.

[07:04:32]ACCESS: Logout: no key/(Ezra Baum) (Exotic Particles Collection - 299,295,5) [07:04:32]ACCESS: Login: StreptoMutans/(borer (637)) from [NOPE] || BYOND v511 [07:04:32]ACCESS: Logout: no key/(borer (637)) (Exotic Particles Collection - 299,295,5) [07:04:32]ACCESS: Login: StreptoMutans/(Ezra Baum) from [NOPE] || BYOND v511 [07:04:32]DEBUG: Runtime in action_button.dm, line 93: Cannot read null.screen_loc [view]

I was not turned into a borer, but the borer fleshhook spawned on the ground as an item I could use. It had the hookshot sprite and was usuable just like a fleshhook

Steps to reproduce

1. Have morphing artifact
2. Have it try to turn you into a borer
3. Pick up your fleshhook from the ground and enjoy it for a couple seconds
4. Have the artifact morph you back into your original form
5. Be angry as you altclick the tile you were standing on and notice an invisible /obj/item/verbs/borer/detached

Server revision

98d0c408b29cef69b407ecd17b524cba370fc096

[Kammerjunk]

I made the effect only spawn types of /mob/living/simple_animal/borer and left it active for like 10 minutes after confirming that it happened what the fuck I wasn't even standing near it for those 10 minutes, I was standing 1 tile further than the effect's range

Edit: What the fuck is this bug