@metawops Please check if the .shellfishrc for this Debian LXC matches what you have on your other machines.

This command will show the relevant encryption key:
grep "local key" $HOME/.shellfishrc

Also when testing this I suggest using the ‘notify’ command that has the same dataflow but fewer moving parts on the iOS side.

@metawops I think the log file I marked on a preview screenshot would contain helpful information.

It would show if the payload got delivered or not and whether there was some kind of decryption issue.

One underlying assumption is that your devices are signed into the same iCloud account with iCloud Keychain enabled. This is how the encryption key can be shared between devices.

@metawops I have had another report of the widget not updating even though nothing has changed for this in a long time. Strangely enough rebooting the device would change the widget for this user, indicating that the data is somehow passed to the system.

Perhaps iOS updates have changed something and the app needs to adapt.

@metawops xxd is a command for creating hex dumps and I was under the impression this was available almost everywhere. https://linux.die.net/man/1/xxd

This assumption should perhaps be revisited.