Merchant Tab: unable to add items

I have 4 merchant tabs, named "2", "3", "4" and "5".
I can add my RearGuard (as an example) to tabs 3, 4, and 5 for sale.

Yet I cannot add it in tab 2, even if there is space. When I hover the item in the tab, the background is red.

Fun fact, I have several items in tab 2 for sale. If I remove one, I cannot readd it afterwards, as if the tab was "Remove-Only".

Bug ID: 4,207,033,536

Has been bugged since Async was first added. There's a few causes. The main fix is to just wait 5-10 minutes and the tab will fix itself on re-zone.

Yes you're right, it's working again.

Amazing, thanks for the info.