New Reolink Wired POE Doorbell Cam ?

The switch is Ubiquiti USW-Pro-48-Poe with the newest firmware (and control software is also the newest publicly available version). All ports in use (48x1G+4x10G). 10+ ports are feeding PoE/+/++ power to devices.
These Reolink PoE doorbells are the only devices that does this connect/disconnect. Both this new one and the older one does this regardless of the connected port.
It is not also about power because I have tested with PoE and PoE+ and PoE++ connections. All other devices works fine like CCTVs in the same switch (Hikvision and Dahua).
Also it is not about the cable. Already tested this multiple times with multiple cables. The cables used are CAT7 sftp cables which are in perfect condition.

There is no port sleep ability in Ubiquiti switches, or timed PoE on/off ability. And still DB respond immediately when manually connected even when the log says it is disconnected.

I have noted that during those log claimed disconnect times no records are made to NAS either. Is there events to be recorded during those disconnect times is what I do not know and am worried about.
What I am worried is that what happens during those log claimed disconnected times. Is Reolink alive or not? Will all the events be recorded or not? How deep is the "sleep"? Is it the switch that interprete the device to go offline when there is no traffic?
What I know that if events happens often (like <15mins from event to next, dont know exact time) it does not disconnect (no makings to log). But if doorbell is inactive longer it goes offline (marking to log).
When in disconnect status (by switch log) when I connect directly to Reolink either by Reolink Android app or VLC/WinApp by Win11 computer it works fine immediately.

Either doorbell goes to active sleep (shutdown the connection/network) or markings in the log are faulty. Weird thing.
If the Doorbell does go to sleep, I am not aware of it since I have a RTMP stream 24/7 going to Blue Iris with No Disconnects or interruptions. Maybe that is what you need to do, You mentioned NAS, Synology? Try a steady 24/7 stream instead of motion events recording...or both, if Surveillance Station allows two streams, assume it would. On BI I have 24/7 stream to capture all footage and a motion detection stream with CPAI to send me notifications when people/animals/etc. are in view, also if someone rings the doorbell...

Unless I missed it in your post, I would try not using your switch power and power the Doorbell with an PoE Injector to eliminate any possible power compatibility issues. If on a VLAN, test a port without.

I will turn off my 24/7 stream for a couple of days to see if my Doorbell goes to sleep (disconnects on my pfSense router logs and or my TP-Link Managed Switch) I run an Enterprise network too, I have all Business switches...My Doorbell installed is the WiFi version, so my disconnects would be via RF if it went to sleep. But my logs should tell me.