@hankschwie hi mate, so at long last the latest update has sorted the reboot problem - this is version 280 of Ubuntu 24.04 as of 26/06/2025.
I don't know about Fairfax phones but have a Gigaset GS5 which I used the Vollaphone 22 with new screen install. Phone works, Ubuntu works, and now Waydroid is back.....
These folks are truly amazing