How is the "Execute a Command" feature of Remmina used correctly?

I am using Remmina on Pop!_OS 21.10 to remotely connect to a Windows 10 machine via RDP. This is working well, however, I am having some difficulty understanding how exactly the "Execute a Command" feature found in Connection Profile > Behavior works. I couldn't find anything related to this in the user guide or much discussion around this anywhere. I would like to execute a command after connecting, but the command does not execute. The command I would like to run will remove the GNOME titlebar: xprop -name "Windows 10 RDP" -format _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS 2. This works as expected when executed directly in the terminal, but not when set identically in the "After connecting" field shown above. My troubleshooting steps thus far: - Wrap the command in a script, and call the script from the Remmina config. Command still did not execute. - Remmina was originally installed as Flatpak, and I thought maybe there was an issue executing a command outside of its sandbox. Uninstalling and re-installed from .deb package did not resolve the issue. - Test "Before Connecting" command; this also did not execute. - Create new connection profiles from scratch. - Test with connection to different machines (Windows & Linux)