I can just add my two cents to this thread ...

It seems that the PIP feature only works if the WOWq windows are located on the same screen ...
with my 20" and 24" configuration .. here's the ugly result :

Normal viewing Char 1 (reduced to 1280 px)


PIP view with Char 2 focused (reduced to 1600 px)


ugly isn't it ? and this happens with char 3 too
I start playing without the 20" on the side ... and the PIP feature was working as planned ... not anymore with tho displays