Send HTTP POST body or URL changing &LT to a less-than when the field name in the form starts with LT

That's my question... something in the Hubitat UI must be doing the conversion thinking it is HTML when I just want it to be taken as plain text. Shall I dig into the javascript of the UI to find out what event is triggering it?

Looks possibly related to Characters are removed in body for POST - #9 by ChrisP but I'm not putting in HTML - the hub is converting it TO HTML.