RemoteApp MacOS RD Client Not Rendering Context Menus (Works on Windows RD Client)

When connecting to a RemoteApp via Windows RD Client, a particular RemoteApp I use works great. However, when connecting to this same RemoteApp via the MacOS RD Client, when I right click on something on the program to open a context menu, the menu very briefly shows up and then disappears, making the program almost useless as lots of functions require right click menu access. Even though the menu visually disappears, if I click where a button on the menu would be, that selection works, so the menu is being "opened" it just isn't rendering properly.

I thought it might be an issue with this particular software and remote connection use however this does NOT happen with Windows RD Client as mentioned, and it doesn't not happen on Windows or Mac when a full RDP session (with desktop) is used. This seems specific to the MacOS RD Client with RemoteApp mode being used.