REOLINK Camera image zoomed in with lower resolution in stream setting

[user_626966438326273_626966438326273]

I installed a setup a year ago with a Synology NAS and a number of POE REOLINK cameras (with POE doorbell). Recently I installed a new installation at another location with 6 x POE REOLINK cameras (also with POE doorbell).
Cameras in new installation:
1x RLC840A
2x RLC820A
1x RLC810A
1x POE doorbell

In the new installation I have a problem with all cameras except the doorbell.
I open the camera directly with the IP address or with the REOLINK app (Mac latest version and latest Mac OS)
If I adjust the stream in the settings to a maximum resolution of 3840x2160, the image is complete and good.
If I adjust the stream in the settings to a lower resolution (with any frame rate), the image is slightly zoomed in.
This is on all cameras except the doorbell.

If I apply the same settings in the older installation (with similar and same camera types), the image remains complete and good, at any resolution.

What is actually going on here, why is that image zoomed in on those newly purchased cameras?
Firmware has been updated to the latest versions in all cameras.

How can I solve this?