Kill this container.
docker.enhance.com/ftpcd:1.2.2
Block all these ports
0.0.0.0:21->21/tcp, :::21->21/tcp, 0.0.0.0:40811->40811/tcp, :::40811->40811/tcp
That should do the trick for you. No idea how much it will upset orchd and if it will continue trying to restart that docker container.
Beyond this, I'd maybe open a ticket and request assistance.
Also be aware that most services are getting combined into appcd after v12, so you'll probably not be able to just kill the container and instead need to kill the service. ie. systemctl disable proftpd (if it's proftp they'll use going forward)
Edit: Was answering before Aliysa_Enhance reply came through. Take their word for it.