Google voice calls drop continuously

I love this little router, it solves many problems for digital nomad. But when I use google voice, which defaults to wifi calling, the signal continuously drops out even though im only 3 feet from router. The router is plugged into hotel wired outlet, the speed is 50MB/s. Mobile phone connects to router wifi. I know it will be easy to blame the hotel internet but i dont think that’s it since everything else works fine.

which model please?

Unfortuantely I cannot use Google voice because they do not provide service here.

I used google meet and seems it is fine.

Pls note I do get several checks about drops when using Google meet but I cannot find the root problem yet because it works fine here.

GL-MT1300 is the model… is there anything i can look at?