For me it always worked fine again when moving the ATC and sometimes map window. Try a few things with the ATC window such as moving it around or requesting different hights.
Had this issue several times but this usually fixed it for me.
For me it always worked fine again when moving the ATC and sometimes map window. Try a few things with the ATC window such as moving it around or requesting different hights.
Had this issue several times but this usually fixed it for me.