Perpendicular snap appears when it shouldn't ?

BricsCAD BIM v 26.2.06 FR
Before submitting a bug report, I'd like to make sure the behaviour I'm witnessing is as abnormal as I think.
Context :

  • BricsCAD BIM v 26.2.06 FR
  • a drawing with only a simple polyline
  • only "endpoint" and "perpendicular" snaps active

When I use the "move" command and select the polyline, perpendicular snaps appears when there should only be endpoint ones.
Is this a practical problem ? Yes ! Because, in more complex situation, a user could (been there, done that) click inadvertenly (because it isn't expected to be there) when the perpendicular snap is active, and thus get a slightly wrong base point.

Am I missing something, or is it a bug ?

Joined : a video, and a dwg.