Getting "Server does not recognize specified tradeskill container" from oven in Erud

[Warsong]

Doing a combine in said oven gives that error, after which the client misbehaves (it can crash, or just not work right, like "unable to click on items" or "escape key no longer brings up the menu"

I have attached "eq_oven.jpg" that should make it clear which oven has this issue, and "eq_oven_combine.jpg" which shows the error. I reproduced it, but haven't, say, done it 10x in a row. Other ovens are working fine for me, so it probably isn't my local config. And not a super important one either. Just making sure I share. If there is something else I can do to help, please let me know.