If you toggle between Single Band and Multi Band View the upper row goes blank and comes back again if you close and reopen the plugin.
Cubase Pro 12.0.30
Windows 10 Home 64 21H2 / AMD Ryzen 1700 @ 3.6 GHz / Asus Prime B350-Plus / 32 GB RAM / GeForce GTX 1050 Ti / Steinberg UR242