I'm running OpenCPN
4.4.0 on Ubuntu 14.04 and 16.04 and discovered this problem on both. I right click on the chart and select "Center View" from the pop up menu. I enter a position. It looks like "Center View 2.png" attached. I click "OK". Now the screen
looks like "Center View 3.png" attached. When I try pressing the "+" or "-" key and I discover the program has lost
focus. I click somewhere to restore focus, zoom in or out, and the display is restored and the chart centered on the position I entered.
Next I turn on auto-follow to return to my starting location. The garbled display appears again. Focus is not lost
and I can restore the display by zooming in or out.
Can anyone duplicate this?
I'll try this in Windows soon and report the results.