Some VPN providers rely on systemd-resolved to set the nameservers the resolver should point to during the connection.
Manjaro defaults to use resolvconf (openresolv) and switching to systemd-resolved may me just the change you need.
The topic [root tip] NordVPN on Manjaro is written with NordVPN in mind but is very likely to work with any VPN provider.
If you replace the specific mention of nordpvn commands with the commands for Hotspotshield you should be able to figure it out.