That depends a lot on your threat model. In many instances it will be better to share an IP with all the other VPN customers. EDIT: Also, without this leak, An

That depends a lot on your threat model. In many instances it will be better to share an IP with all the other VPN customers. EDIT: Also, without this leak, Android API "VPNs" can actually distinguish traffic of individual apps, acting as a firewall that blocks untrusted apps from sending your data somewhere else. With a DNS leak, they can exfiltrate data through it.