Neptune3 on MacOS 10.14.4 starts with a terrible flickering. When the vehicle apps is running, flickering does even not stop. It looks like it is specific to MacOS 10.14.4 and has been recently reported in
The effect is so intense with Neptune, that I believe we should make a release with Qt 5.12.3 if we want to have a build on MacOS look as well as we know it. See the attachment with the screen recording.