Right clicking a Zebra while holding tetra greatsword in main and shortblade in offhand, fed my mainhand greatsword to the zebra.

I was streaming so I was able to access the VoD and verify this actually happened.
https://www.twitch.tv/videos/870390046?t=3150s

Yeah thank you for telling me. I'm working on it. Really sorry for the inconvenience.

I have also had this issue and was actually just about to report it.

I can also confirm it works on all items rather than just weaponry. This includes both modded and vanilla items.

I think that I've fixed it in version 2.5.2, which I'll be uploading in just a few minutes.