yes, even on other networks. I think the problem happens when you go out and come back and then the WiFi reconnects. only Airtel vowifi gets enabled then automatically. jio vowifi stays off until when you turn it on manually
I have faced this problem always with the combination of jio SIM and Samsung phones.1. for the last 1 year, I face the issue on Samsung galaxy S9 where randomly the jio WiFi calling turns off and it doesn't turn back on. if you check the WiFi calling...