BTC-Wallet from "Airgap.it" asks for Receipient-Adress-Prefix "1ABC". What format is that?
The Prefix "1abc" is part prefix "1" and part wildcard "abc". so it asked for the P2PKH-format all along. there is NO secret third format with a fixed prefix that is always "1abc".

I reported the issue of the QR-code accepting BECH32-format with the developers. using the right address everything works like a charm and is a very nice alternative to a hardware-wallet if you have a old smartphone to spare.