The Follow Trajectory rotation setting is functioning just like the Pen Tilt setting, instead of following the stroke (see below image).
Like when I made the reverse S shape in the middle there, the rectangle didn't turn onto its side to match the direction of my stroke. Instead it matched its angle to the tilt of my stylus.
Is it broken, or is this the intended functionality?
I'm using the latest version of Rebelle (3.2.1) on Windows 10.