Android. And some other app got weird after the last Samsung UI update, although I would suspect that's not it as the Insteon add/delete looks fine. I've got an early eisy with the official UDI dongle on a cable. It doesn't seem to have issues controlling existing Z-wave devices, and if I invoke the Z-wave inclusion from the desktop UI, I can see the progress on my phone.
Samsung Galaxy S22; Android 14; One UI 6.1.
Restarting phone did not help.