I have the exact same problem with my Asus Zenfone Max Pro M1.

[JPC]

Re: No internet connection in Waydroid (OnePlus 5T)
It is unclear to me was a solution ultimately found to this issue, but I thought that with the extra information I have given below maybe someone could point me in the right direction to sort my problem out:

It is really strange that, as you said, very occasionally Waydroid does get an internet connection, but it lasts for just a very brief time and I cannot replicate it no matter what I do. Also strange is that while of course the browser does not work in the absence of internet, downloading an app eg. from F-Droid does work allbeit taking a very long time to do so!?

Ubuntu Touch WiFi settings show that it has an IP address in the style 192.168.0.XXX, whereas Waydroid Wifi settings show it has address of the style 192.168.240.XXX. The former is replicated in my router's ARP User List together with its MAC-address. The latter (Waydroid) is replicated numerous times together with a MAC-address of 00:00:00:00:00:00. In the router's list of active DHCP clients it is only Ubuntu Touch that shows up with the name "ubuntu-phablet".

Hopefully someone can help me here to resolve this which is the only issue I have with an otherwise impressively functional installation of UbuntuTouch / Waydroid.

Best regards

JP