The host is goes offline. Raspberry PI

Hello dear community.
I have a remote host connected to my zerotier network. This is a Raspberry Pi.
“Raspbian GNU/Linux 11 (bullseye)”
user@raspberrypi:/ $ cat /etc/debian_version

Everything worked well until I installed zabbix-agent on this host.

zabbix-server is not connected to zerotier network. zabbix-agent just sends data to the server in active mode.

I only use zerotier to access the Raspberrypi CLI via SSH.

After I installed zabbix-agent, the following problem appeared:

Right after turning on the Raspberry, I have access to it via SSH via zerotier. On zabbix-server data sent regularly.

However, after some time from 1 to 5 hours in the zerotier control panel in the personal account, the remote host Raspberrypi goes offline…

There are no problems with the Internet, since I still see that the data is being sent to zabbix-server.
Only reboot of the remote host helps to restore remote access.

zerotier and zabbix-agent are managed by the systemd manager. I don’t see any obvious problems.

I’m not a Linux expert so I turned to the community.

Perhaps someone has already encountered a similar problem?
Can anyone give direction for troubleshooting?
I couldn’t find the zerotier log file and I still can’t figure out the reason for the goes offline remote host.
Perhaps these two services somehow conflict with each other?