Fixed: I had the same issue with Cubase Pro 10.5 on a Hackintosh with a Radeon RX 5700 XT running Catalina 10.15.4. The macOS Update to 10.15.6 solved the problem.
Fixed: I had the same issue with Cubase Pro 10.5 on a Hackintosh with a Radeon RX 5700 XT running Catalina 10.15.4. The macOS Update to 10.15.6 solved the problem.