Bug in Mac version: names of mandatory reporting points are overwritten

I have built a vfr flight plan from LOWS to LOWI. In the normal view the names of some (not all) reporting points are overwritten by “VPxxx” (picture 1). When I click on the flight path and move it a litte bit, the names are displayed (picture 2). When releasing the mouse button the names are overwritten again.
In the iPad OS version displays VP066 too, but also the names of the reporting points (picture 3).

Navigraph Version 8.16.0 (8.16.0).

Picture 1:
Look at VP066. This should be MIKE 1.

Picture 2:

Picture 3: