Since SFOS 5.0.0.55, my Whisperfish cannot receive messages anymore. Whisperfish is set up as a primary device on the Xperia 10 ii.
@best-test-400 has reported a similar bug: “Updated Sony Xperia 10 II to Tampella 5.0.0.55 → Whisperfish can send messages but does not receive them any more, no matter which internet data option is selected.”