Hello, apologies if this has been posted before.
I experienced similar network problems to other users (endless failed attempts to sign into Google Play games)
I've had some success with solving this.
I'm using Avast mobile security. It will (annoyingly) flag up your wifi connection as a potential risk that it wants to scan.
You can still browse etc, so it's easy to ignore day to day - but I think it interferes with Pathfinder.
At least I get better results connecting when I've resolved avast.
Maybe other users are suffering due to anti-virus software too? Worth a try anyway.