Galactic Market Leader disappearing upon Subject integration bug

[Jens Heika]

One of my subjects became Galactic Market Leader. At a later point I integrated said subject, expecting the Galactic Market to either stay (and become mine), or relocated to another Galactic Community Member, but it did neither, and simply disappeared, the market UI even became bugged, showing no Galactic Market (while still functioning).
There is the option to Relocate the Galactic Market in the Galactic Community, but it can't be done because "The Galactic Market was relocated too recently".

It should be simple to recreate, just go through the Galactic Market event chain without nominating a planet (I did, but lost), and be the overlord of every AI empire (minimum of 3). Then when one of them becomes the Galactic Market Leader, integrate them.

[shizbang]

I am having this problem right now. Anyone know how to fix this?