Connecting Route10 to an Existing Network and Local Controller

Ok, here’s the current situation:

What I have:
WAN1 - PPPoE (Metric 100)
WAN2 - DHCP LTE (Metric 200)
VLANs: 1, 10, 100, 150
Route10 v1.3v
Controller v1.0t (software on Proxmox) is on VLAN 150. Regardless of whether I use WAN1 or WAN2, it remains accessible.
What I tried:
At first, I hoped I would be able to set the subnet during configuration (which didn’t work). Later, I thought that since I have two connections, I could switch the LTE connection to Route10, connect my computer via LAN, and specify where it should connect by providing the generated DDNS address. That worked—Route10 appeared in the controller, I was able to manage it, and I configured the necessary ports.

VLAN Configuration:
LAN3: VLANs 10, 100, 172
Question: I want only these VLANs to be available on this port. Should I leave Native VLAN as Default and add 10, 100, 172 in Allowed VLANs? Or should I set one of them as Native and the rest in Allowed?
LAN4: Native VLAN 1 and 150.

Previous State:
After switching to Route10, the network works—I can log in to the controller and obtain an IP from each configured subnet. However, Route10 cannot communicate with the controller; it just shows “Disconnected.”

I have already restarted the main switch, Route10, and even the controller. I didn’t expect this to help since I still have internet access, and port forwarding to static servers works, meaning all devices are communicating.

I should note that this happens whether WAN1 or WAN2, or both are connected at the same time—the result is always the same.

Current State:
I set Route10 to DHCP (LTE modem), and it successfully connects to the local controller. I configured the remaining ports so that everything would work after switching.
WAN1: PPPoE
WAN2: DHCP
LAN4: VLAN 1 and 150
LAN3: VLANs 10, 100, 172
Route10 remains visible in the controller. For testing purposes, I connected it to a separate VLAN created specifically to check if the connection would be established—and it worked. So in theory, everything should work after swapping the devices…
However, for some reason, it doesn’t. What’s worse, in previous swap attempts, the internet was still working, but now nothing works at all.

Honestly, I was hoping to replace my RB5009 and finally have a router with a unified management panel along with my other devices and WireGuard. But at this point, I don’t see how Route10 could replace my current setup, let alone be a viable option for my clients.
Each of them already has a configured network, and the inability to integrate a router without reconfiguring everything to fit its settings defeats the purpose.

For now, I’ll put the Route10 on the shelf and monitor it in the software. PLEASE ADD the ability to restart Route10 from the controller. The AP and switch are working flawlessly.

One more thing—I used two SFP modules in this device:
LAN4: Fiber module (Ubiquiti 1G-MM) – works without any issues, starts immediately.
WAN2: Ubiquiti RJ45 1G – here’s where things get weird. When I insert it into WAN2 or LAN4, it takes a good 1 to 1.5 minutes to start up.
On Mikrotik, however, it works instantly.