I had face connectivity issues and quite regularly. I can not blame free vpn services as you wont pay to them, though mentioning some of them who create less issues(https://www.reviewsed.com/best-free-vpn-services/). But even i saw such issues in premium packages so i would also recommend to go with Expressvpn or surfshark as they have great advanced features that provide you smoothless service with out any disruption.