Intermittent mobile data connection when logged in to a zoom meeting

I was online in the car while on a zoom meeting and went to an underground parking. That cut off the mobile data connection for a few moments and went back up after that. And the connection started to go on and off. Even now, whenever I do a zoom meeting, the mobile data connection goes on and off with around 3 seconds interval between an on to off. I had - reinstalled, not working, - called network service provider, it suggests I reset network settings, which I'm not doing it yet because I don't want to lose passwords, - and then what has been done was I cleared cache and data, but the problem still occurs Should I really reset network settings?