After update Dorico to 1.2.10 i have have the problem as show in attached image.
Rebooting your computer should rectify that problem. Please try and report.
Nothing with reboot.
I reinstalled Dorico…
its ok now…
What was that?
This Problem occurs on my system too…
Did a reboot solve your problem too?
Nothing like this on OS X
Reinstall helped, reboot didn’t
Reboot worked on my Windows PC