I created a new custom identity issuer in Oauth2. To my pleasant surprise, after just completing the settings in the Edit Identity Issuer Gear page, it managed to automatically populate most of the endpoints and field mappings. That is great and a real time-saver.

However, I needed to add a few extra endpoints and additional field mappings. Saved them. Great! it all worked.

However, if I go back and edit the identity issuer, the moment I save, it resets all of the settings in the Endpoints and Field Mappings pages. Any custom fields I added just vanish!

This is new behaviour. In previous instances of Moodle that I installed just last summer (Moodle 3.6 and 3.7), that was not the case. The fields were not populated automatically and the field mappings had to be created manually too.

So it is great that things are now automatically populated, but once it does that, it should not reset everything each time I save a change (like the Logo URL, or even make no changes and just save).