Welcome to the forum!
No worries, I'll move this to Beyond the Basics board.
To answer, I'll be glad to test, but I'm a little confused about the steps to reproduce.
-- type text
-- "combine" Does that mean Path menu > Combine? Or maybe Path menu > Union?
The only way Ungroup could be the next step, is if "combine" means Path menu > Object to Path. Not unless "combine" means "group". But then why group then ungroup?
Sorry, I know it sounds like I'm being picky about terminology. But I'm honestly not sure what steps are happening to create the problem.
Omg! Since when does using Path menu > Combine, convert the text to paths? I would tend to think it was a bug that Combine converts text to path in the first place. That's what Path menu > Object to Path is intended for. Or Path menu > Union is a special shortcut.
However, if that's intended (by developers) then
1 - using Combine on text results in "Path (number of nodes) in group text1234" in the status bar. So if using Combine on text is supposed to create a group, it's not identified as such, in the status bar. The status bar should say "Group of whatever...." It seems as if the focus is being inside the group.
2 - using Ungroup on that path/group, the status bar says "No groups to ungroup" and nothing is ungrouped.
3 - If I deselect the path/group, and reselect, the status bar then identifies it as a Group of 1. (I would have no idea why it does this, or what the intended purpose is.) And then it does get ungrouped.
If you ask me, there are 3 or 4 places here, where any potential bug might be, including the fact that Combine does this at all. I have no way of knowing what's suppposed to be expected, or where it's going wrong. If this is a new feature, I would question what it does, that was not already available by Object to Path. It would seem unnecessary to me. Or maybe it's been around a long time, and I just never stumbled on it. But it seems superfluous to me! If I were considering to make a bug report, I would suggest to disable the ability for Combine to convert anything to paths.
For my own suggestions for sbrochew, I would avoid using Path menu > Combine, directly on text. As far as I know, Combine is supposed to only work on paths, not on text or anything else. It's meant to combine more than one selected path into a compound path (made of more than one subpath). And since text isn't already a path, it should not be working on text.
Instead, you would be better off using Path menu > Union on the text. Then the resulting paths will be ready for the extension (without needing to ungroup or anything else), and not give any error.