When reporting a problem, you should always include a proper report, like:
- which airport has been used
- if it's default or 3rd party. If it's 3rd party if it has been bought on the Marketplace and if it has, if you enabled the SU10 Navdata API option.
- if you are using a custom profile for it
Since the only post in this thread which included a bit of info referred to default KLAS and nothing else, I just tried it at default KLAS, with the Asobo A320 and no GSX profile for it, that is the only thing I could try with such limited information.
And sure enough, the Marshaller is working normally:
https://youtu.be/eXMt8OWOUC0Something like you are reporting might possibly caused by an error, which might be connected to the airplane or airport profile so, enable logging from Troubleshooting section of the GSX Settings page, restart GSX, try it again, and after it happens, exit from Couatl from the Tray bar icon, and post the Couatl.LOG file which should be located here:
%APPDATA%\Virtuali\Couatl.LOG
ZIP the log and ATTACH it to a post.