Wired devices can only access internal network

So I'm 100% sure this is some stupid mistake I've made but here is the situation:
I have 3xZyxel Multy M1:s running OpenWRT (23.05.2), two of which are connected via wireless mesh, and two with a LAN cable. <-> (wireless) <-> (wired) is connected via LAN to the internet gateway
Problem is that any computers connected via LAN to can only access devices on the LAN (excluding the gateway), while devices connected via wireless (to the same node) can access the gateway and internet just fine