I noticed a bit of a glitch in the app on Sunday,

I was booked into WTP and I upgraded using Avios to CW several hours before check-in. After check-in the Boarding Pass showed the correct seat I chose (in CW) but underneath it said WTP as the class.
Caused a bit of confusion because it's a CW seat with WTP underneath it! Luckily I had no problems accessing the lounge once I asked the staff to look it up on the system but not sure if it was a one-off or a bigger problem?

I tried refreshing the boarding pass several times but there was no change.

(Also: Yay, Passbook soon!)