@unhappy_nester
I'm just another Google Nest customer like you, but I DID read your post and the Help topic to which you linked. I can't tell WHICH Nest wired doorbell you have (the 1st gen Google Nest Hello Doorbell or the 2nd gen Google Nest Battery Doorbell or the 2nd gen Google Nest Battery Doorbell, wired). And the only way--without a Nest Aware subscription--you should get just a single image for events in the most recent 3 hours is if you have the 1st gen Google Nest Hello Doorbell AND there was just one event in the most recent 3 hours), I thought I would share what I know about the behavior of both 1st and 2nd gen doorbells, as well as when the 2nd gen doorbells became available, in hopes that this might clarify what's going on in your situation. If you have a 2nd gen doorbell that is only providing a single still image for events in the most recent 3 hours, that's an odd behavior I don't think I've seen reported in this forum.
If my answer does not help, you could contact Support:
1. Go to https://support.google.com/googlenest/gethelp.
2. Select a category/product family, and type in a brief description of the issue, then click "Next".
3. Click "Other", then click "Next step".
4. Under "Resources", just click "Next step". (Clicking one of the listed links will bring up a Help page page.)
5. Under "Contact options", choose to get a phone call or chat with the team, depending on availability in your country.
Or you could try removing your doorbell from either the Google Nest app or Google Home app (as appropriate), doing a factory reset (https://support.google.com/googlenest/answer/9252162), and then reinstalling your doorbell.
