I have three P9s set up in AP mode on UK Virgin Media.  Originally set up as Router mode, but my son's iPhone XS lost connection intermittently, but regularly.

All other devices connect just fine and speeds are pretty standards throughout the house.  I have noted that some devices are reported as connected even when they're not switched one, but that doesn't bother me.

I have a Samsung S8 which, up until recently, worked just fine.  Now, however, it reports an authentication error when I'm downstairs near the main P9.... incorrect password.  But, it's not.  When I'm on the top floor, it connects just fine.  Presumably to one of the closer P9s.

Makes no sense as other phones (iPhone, Honor & Motorola), which roam around the house, have no problems.

Any thoughts/similar experiences?