So I was using the service camera.snapshot already for quite a while. The snapshot was then saved in the following location.
/config/www/images/frontdoor.jpg
I now see that since the end of dec.2021 this has stopped working. My latest snapshot is from the 21st of December. When updating the automation where the service camera.snapshot is included and tried to save the snapshot in the location under a different name ( /config/www/images/test.jpg) it also did not appear in the folder.
So maybe somewhere in HA some local file rights have changed? How can I check this?