OPNCPN 5.0 Stops working when zooming on WIN10

[scud]

I upgraded few days back to OpenCPN 5.0
At a first glance everything looked fine then I noticed I had all the fonts in the option windows on the large side. Managed to bring them to size 12.

Now when I zoom in some area (doesn't matter which area of the globe) randomly it stops working when the range becomes small and then shuts down.

The problem originates with no specific zoom range but always on the small range around 1:58000 or 1:64000 or when panning very fast.

I tried the +/- heys from the keyboard, the mouse wheel or the +/- lens icons on the screen. It always stops working at some time. I have the impression that by using hte keyboard it may take longer before it stops responding but it's just a feeling maybe.

looks tlike some stack overflow issue . Shall I try to re-install eventually ?