I noticed that if I use UNDO once in Live mode, it removes the last thing done. But if you do something else and use UNDO again, it goes back to the first thing you “undid”, and subsequent uses of UNDO just toggle between your last two UNDOs so nothing is really actually undone. Is it supposed to do that?
Due to the way live mode works… I think you are looking for 2nd+ Delete. I believe the reasoning is if you have to do more than one undo in a Live mode recording you should probably just delete the line and start over again… But this is just a guess… I haven’t refreshed myself on this feature… When in doubt, rescan the user manual or watch sections of the loopop indepth overview.
See, top “index carded” entry that references the manual.