When I take wall joins down to 0.5" or even ZERO, and remove my walls from cleanup, under no circumstances should Softplan EVER adjust them. I have a confluence of exterior walls where three walls meet at different heights, where a single storey 10:12 pitch meets a two storey 5:12 pitch, and have adjusted then so that they meet BEHIND a 90" corner trim symbol. Every time I open the drawing or edit the drawing, Softplan decides that these walls HAVE to meet differently than I have left them and leaves a gap between the wall and the trim.
LEAVE IT ALONE ... I've lost count of the number of times I've had too put this wall back where I want it.
I hope this is better in 2020 ... when we finally get round to using it!