We have a few Portal mapping apps that we are using, and with my personal Samsung Galaxy 6S, the pan works just fine. With my work phone, the Samsung Galaxy 9, the pan option does not work. Unfortunately, there are several other Samsung Galaxy 9 phones in our organization.
The only wild guess I can make is that it may be related to the Galaxy 9's curved screen. This may not be the issue, it's just a guess.
Has anybody had issues with panning Portal maps?