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.
Set "Themes" service in services.msc to manual or disabled. The issue was that for some reason it was setting windows to use aerolite theme instead of just aero
