Desktop greyed out
I use TeamViewer to connect my iMac to my neighbours Mac Mini. Both machines are running Catalina 10.15.4 and TeamViewer 15.4.4445.
Until I connect both machines work normally. When I connect, the Desktop on my neighbour's machine greys out., i.e. the Desktop picture disappears. When I disconnect leaving TeamViewer running on both machines, the Desktop picture reappears. Screen Recording is checked on both machines.