Hello, so I have a tp link archer be400 wifi 7 router. After I updated to the latest firmware, UPNP stopped working. I can see the ports open in the UPNP section of the router but when I check it using websites like port checker, it shows they are closed. But manually forwarding the ports works and they show open on the website. Also when I create a guest network and enable bandwidth control, all the devices on the network lose internet access. When i disable bandwidth control, the guest network works again, this is the same issue for the main network as well because when i limit the bandwidth for individual devices, they lose internet access but without any bandwidth limit, the network works fine. I can't even revert the firmware as there's no way to download the firmware manually for be400 as it's all automatic. Please fix this or at least provide a temporary firmware or something if available, Thanks.