It seems this problem is NOT scenario specific: I encountered the progression bug in 5-1 Attack on Sandpoint
I played with Ezren, Valeros and Merisiel.
Three locations were permanently closed, one temporarily. Ezren encountered The Scribbler at the Thassilonian Dungeon and defeated him for the first time (which means he is NOT defeated (Villain's special power). Ezren used his power to draw a card after playing a spell and afterward there was the blue arrow. However clicking on it didn't do anything, so I was stuck!
Going to the vault or main menu didn's solve the problem...
MyPFID: C22CC0864AE53A9E
What device type are you on? iPad pro
What version of the OS are you running? iOS 10.1.1, etc.
Login Issues
When you launch the game, does the welcome popup appear for Game Center/ Google Play Games? Yes
On the main screen, what is the text displayed in the blue box at the top? Nickname and #
Gameplay
Is pass & play on? Is permadeath on? No and no
Tutorial, Story Mode, or Quest Mode? (If not quest mode, did you recently enter it?) Story mode
Characters in Party Ezren, Valeros and Merisiel
Location of each character Ezren at Thassilonian Dungeon, others ?
Turn Order Ezrens turn
Scenario & Scenario Difficulty. If on non-normal difficulties, which wildcard powers are in play? Heroic difficulty, Wildcard: bury card when aquiring item etc.
What card was encountered when the issue occurred? (Or check, or card just played, etc) Combat check against The Scribbler
Did the issue occur on the first explore or a subsequent explore? First Explore, combat check successful