Minecraft Bedrock server port forwarding works on host network but not other networks

I’m running a Pocketmine bedrock server off my PC. I port forwarded my system’s static IP with the default port. I can connect to my external IP on my house internet but if I switch to my guest internet I can’t connect to the server with the external IP. I know the port is open because I can connect on the home network and I used this website that detects if ports are open to other networks. Anybody know why it’s doing this and what a fix would be?