Chamfer an edge moves the edge up

Good afternoon

During the trial days I started to move some designs from FreeCAD Linux to Shapr3D macOS…
One of them being a simple can lid printed in Ninjatek Cheetah material…

I made a sketch and rotated it as a cutout body for the main cylindrical body…all fine…

But now when I want to chamfer the inner edge as the cutout is larger towards the lid top as at the bottom…but instead of doing it, it just moves the edge:

Bildschirmfoto 2022-01-09 um 15.44.19

Also I am not able to select the edge which is not visible…in wireframe mode in FreeCAD it works.

thanks in advance
richard

PS: At least it didn’t hang doing this today (o;

Ah okay…with transparency it looks better and I know what’s going on…

The limit of the chamfer is 0.8mm…so when I push further it just moves up…as opposed to FreeCAD which wouldn’t allow to go further…which is correct in my opinion…

Let’s wait for the next screen freeze on macOS :wink:

cheers
richard