Reporting bug on Build 3.2.0.98, regarding baselines on walk-behinds being ignored.
It occurs after editing walk-behind areas. It remembers your last working settings, and ignores any changes to the walk-behind baseline.
A fix to this is simply to choose "Walkable areas", change your scaling-level value to something else, say 99, and change it back to 100. The baseline and walk-behinds should then work again.
Ah I see what you mean, changing the walk-behind baseline doesn't mark the room as dirty. Thanks for reporting it, I'll get it fixed.