I ran the game using the Android app. Any mention of 'game crash', refers to the game or app unintentionally stop running entirely.

With Hinterland Sanctifier on the battlefield, when Fiendish Panda was played (from hand), the game suddenly crashed. When attempting to rejoin, the game still crashed. As soon as I was able to rejoin the match, I noticed that Hinterland Sanctifier remained on the battlefield and Fiendish Panda was on the graveyard, making Fiendish Panda the main reason the game crashed. My opponent appeared to have destroyed the creature, making it able for me to rejoin the game. Later on the game, I used Scrounge for Eternity to bring back Fiendish Panda from the graveyard to the battlefield (Hinterland Sanctifier was still on the battlefield), and then the game crashed again while Fiendish Panda remained on the battlefield. Everytime I attempted to rejoin the game, the game crashed while Fiendish Panda remained on the battlefield.

To properly able to bypass the bug, you must luckily happen for your opponent to destroy Fiendish Panda and not remain on the battlefield.

UPDATE: I happen to be able to reproduce the bug again just by placing a Fiendish Panda with Hinterland Sanctifier on the battlefield on a different game.