Second network card HA proxmox

Hi.

Here is my setup:

Homeassistan OS running in a proxmox VM.
MariaDB in a container
InfluxDB in a container

Everything is working fine but I want to change how homeassistant connects to maria/influx.
Today it connects through my network 192.168.1.X.

I have made a bridge without eth included, we can call it an internal bridge, no dhcp server. only static ips.

My goal is to use the internal bridge between ha, maria and influx.

So I tried to add a second network (internal) interface to ha but when I do that my first nic doesnt get any ipadress. My first nic is setup as dhcp but reserved in router.

Any suggestions ?