When 2x2 buffs (Kitty Lure, Forest Offerings, Efficient Traps) are applied by a friend with premium buildings at first ONLY display duration including the +50% for friendly buff.
After visiting another map and returning to home isle duration is displayed correctly including the +10% due to premium.
Kitty Lure applied today:
when applied (without prem bonus 1d12h): http://prntscr.com/jtwbif
after refreshing isle (including prem bonus 1d15h36m): http://prntscr.com/jtwbsa
I know this issue also applies to Epic Wood Yard so guess same applies to Epic Farm.