Website blocking

Folks,

Weird behavior, need suggestions. I have a PIA subscription that i use actively.. My ISP router has a protection enabled that blocks certain websites.

Now, on my Android normal browsing and browsing with PIA ON.. in both cases websites are being blocked. But if i use an Aloha browser VPN than those websites work fine.

Why is this behavior? And how can i set PIA to ensure that my router doesn't block them just like Browser based VPN ?