I am running windows server 2019 datacenter, with a basic RemoteApp install. When I initially connect to a session, everything displays as expected. When I disconnect and then reconnect to the session, most of my windows get a thick blue border and some dark mode elements do not display correctly.
Initial connect: explorer on initial connection to remoteapp session Reconnect: explorer on reconnection to session
I tried to change settings related to remotefx in gpedit, as well as regedit. Nothing I tried seemed to make any difference.