So I sent a email to support but figured I would post this on here as well with the hopes that the devs would see this. The PFB causes some really weird issues to happen and when the buff has run it's course, all of the issues I describe below are gone as if they never happened. The process repeats itself as soon as you have another PFB applied to your island. Rinse and repeat it seems.
So I figured out why my entire island randomly freezes for no reason. Every 45secs - 1 minute my entire island would freeze out of no where and then everything would speed back up again. I kept having these issues at the end of the Christmas event when I had a PFB applied to my island and never figured out why until now.
I cleared my browser cache, cleared the Flash cache as well, logged out several times and waited, but the problem persisted until my Premium Friend buff ended, then all of those problems went away as quickly as they started. I figured ok, either an update must have taken care of the issue or something else.
So fast forward a few days to today and I swapped a Premium Friend buff again with a friend. Well guess what issue came back just like before, island randomly freezes in the same time frame and now since my Explorers were out I keep getting the notifications that they returned within 30 seconds of me sending them out (Medium searches), but nothing in my mail. So I can assure you the Premium Friend Buff is broken and something really needs to be addressed about it.