Chat Window does Not Close

I asked to do the LF in co-op in world chat.
I clicked to spectate a match, and it loaded.
After 1 min someone send me an invite, and I accepted it while still spectating.
The person started the adventure (current lvl 4 LF map) and everything loaded normally, but the chat window for the battle stayed.

Spoiler: Screenshot

This is nothing game-breaking but still a bug.

 

If I remember, correctly you can also keep the battle log if you console into the board editor.

 

Battle Log? How would you intend to open the board editor while you are spectating or playing a match and open the console at the same time?

 

While playing a match, open the console with F1 or F2 then enter "boardeditor".