TrueNAS not available (rpc error - no high availability)

Describe the problem

I’m running NetBird self hosted on a VPS and TrueNAS with the NetBird-App and a LXC-Container with Netbird on a Mini-Server at home.

Sometimes NetBird loosing connection to TrueNAS:

The LXC-NetBird shows as connected, but the TrueNAS-App not.

Running the netbird status brings the following:

netbird status from TrueNAS-App

/ # netbird status
OS: linux/amd64
Daemon version: 0.67.0
CLI version: 0.67.0
Profile: default
Management: Disconnected, reason: rpc error: code = Unavailable desc = keepalive ping failed to receive ACK within timeout
Signal: Disconnected, reason: rpc error: code = Unavailable desc = error reading from server: read tcp 192.168.13.66:50150->XXX.XXX.XXX.XXX:443: read: connection timed out
Relays: 0/2 Available
Nameservers: 0/0 Available
FQDN: truenas.netbird.mydomain.com
NetBird IP: 100.85.X.XXX/16
Interface type: Kernel
Quantum resistance: false
Lazy connection: true
SSH Server: Disabled
Networks: 192.168.1.85/32, 192.168.13.0/24
Peers count: 0/8 Connected

netbird status from LXC-Container

root@LX-Netbird:~# netbird status
OS: linux/amd64
Daemon version: 0.67.0
CLI version: 0.67.0
Profile: default
Management: Connected
Signal: Connected
Relays: 2/2 Available
Nameservers: 0/0 Available
FQDN: lx-netbird.netbird.mydomain.com
NetBird IP: 100.85.XXX.X/16
Interface type: Kernel
Quantum resistance: false
Lazy connection: true
SSH Server: Disabled
Networks: 192.168.1.85/32, 192.168.13.0/24
Peers count: 3/7 Connected

Is there a way to make the NetBird-App try to reconnect automatically?
Why can’t I make TrueNAS high available with the LXC-Container?
Is there a way to make TrueNAS high available?

Restarting the TrueNAS-App solved the problem, but this had to be done manually.