Web Push registration fails against safari 17.5

Pushover says:

Error

An error occured in the Pushover Desktop application that prevented it from working.

Permission to show notifications has been denied

Safari Console says:

Notification prompting can only be done from a user gesture

Pre-existing registrations work, although icons all now show as the Safari icon in the notifications.

Safari Version 17.5 (19618.2.12.11.6)

MacOS 14.5 (23F79)