time1.google.com not syncing with REOLINK cameras

[Karlo Great]

I'm using my "Reolink Video Doorbell PoE"....
And having problems with NTP syncing. I tried externally (time1.google.com)
but it doesn't help in any way..
All my firewall ports (UDP/123) are open (VLANS, WAN,.....).. But every time I try to sync it fails...

I have 6 cameras:

• 5 HIKVISON
• 1 REOLINK DOORBELL

All CAM settings are identical (same VLAN, same gateway, same DNS, same NTP server time1.google.com ...)

• The only difference are the static IP's of course but in the same subnet x.x.60.y)

If I test NTP sync on HIKVISION it works fine, but with REOLINK it allways fails...
Can someone suggest what to try more... I pretty much tried everything (package capturing,... ). The only difference I se is the version of NTP:
- HIKVISON using version V4
- REOLINK using version V3

[Edward McGuire]

Can you post the packet capture for the REOLINK.