Hello, I also have the same problem on GL.inet E750 mudi, I had version 3.217, it had a WiFi problem, it connected and disconnected continuously, I updated to 4.3.12 and now the WiFi connection seems more stable but that’s what happens, no internet , the company is Vodafone SPAIN.

You can do some test for the stability of the Wi-Fi connection.
We sell quite a few mudi routers, and quite a few are returned to us with booting problems, they do not finish starting, it is a good product, I hope that with the latest update, these problems will be corrected, I hope you can help me with the main issue to provide customer support