With those dimensions, the wall is 3x Extrusion Width. Cut the modeled wall thickness in half, to 0.75mm, and set Oversample Resolution to 0.10 and you'll get a single path all done with crowning. OS Rez larger than that and the corners don't meet.
BTW, what is an Infill Loop? There are Perimeters and Loops. Infill is done by other means, using differently shaped paths. Just want to make sure that we're talking about the same thing and terms that may confuse people coming along later shouldn't creep in.