[If i use 2. NIC, dockers wont have internet]

Weird - there's definitely a gateway defined in the config you posted...

DESCRIPTION[1]="LAN2"
PROTOCOL[1]="ipv4"
USE_DHCP[1]="no"
IPADDR[1]="192.168.1.3"
NETMASK[1]="255.255.0.0"
GATEWAY[1]="192.168.1.254"

 

I'm a Linux expert, but don't know a lot of how unRaid works. Hopefully everything works out for you.

[If i use 2. NIC, dockers wont have internet]

The solution is not to put a gateway in the static IP configuration for NIC2. A gateway implies that there's a way to the rest of the world from that network, and is what's causing the confusion. Here's an example:

 

 

I suspect folks would prefer that you post in the community forums before filing a bug report.