I'm talking about built-in telnet.run item/key. In my case this SIP server's telnet prompt is non-existent. A user is presented with an input line where they can start typing immediately, not ending character and such. As a result, telnet.run fails to execute an associated script.

I was advised by Richlv to create a feature request so here it is. I leave the design decision to developers. I have been imaging a checkbox that would allow for an empty prompt line, or maybe a user specified prompt line ending.