There are 2 edge cases where the camera movement breaks.
If you jump to the view from top and also jumped to side and front view previously all axis are perfectly alligned and camera movement just breaks. Jumping to the front or side view again, allows the camera to move again.
If you enter the orthographic view zooming does nothing anymore. This is due to the nature of orthographic drawing, but it would be nice if zooming in this mode would rescale the viewport.
There are 2 edge cases where the camera movement breaks.
If you jump to the view from top and also jumped to side and front view previously all axis are perfectly alligned and camera movement just breaks. Jumping to the front or side view again, allows the camera to move again.
If you enter the orthographic view zooming does nothing anymore. This is due to the nature of orthographic drawing, but it would be nice if zooming in this mode would rescale the viewport.