[6.9.2] docker variable value forgotten when it contain pipe symbol

Reproduce:
Have a docker, with a variable, its a text that includes some pipe symbols and it should be passed 1-on-1 to the docker, e.g.

username|password|/home/username

The docker i was trying to use and requires this syntax is https://hub.docker.com/r/delfer/alpine-ftp-server

Problems/bugs seen:

1. The UI made the default value into a dropdown with 3 options. This was not desired.
2. The UI forgot the value because it included the pipe symbol as well.

Things i tried:

So i went looking for how to escape this pipe symbol, tried these but it didnt work:

username||password||/home/username
username\|password\|/home/username
"username|password|/home/username"
'username|password|/home/username'

And went into the documentation starting with the link on the Docker Edit page. 

All i found was this "TBD" section comment on environment variables, but no explanation on regular variables.
https://wiki.unraid.net/Manual/Docker_Management#Environment_Variables

Seems like a bug.

Or did i miss something?

Either there already is a way to escape or encode this symbol in a string value, then please update documentation. Regardless in the docker edit page (UI dropdown feature) there is some flaw in processing this, because it forgets my value if it contains a | symbol.

diagnostics-20220124-2242.zip