I posted screenshots of instant of either enemy monsters or my mage getting stuck in the walls.
The first example of is a screenshot of my mage getting stuck in the secret tunnel between the hatching grounds and the nether cup room.
The next two screenshots are of enemy monsters stuck in the walls in the Artifact Realm dungeons thereby preventing me from totally clearing a level.
Device: Apple iPad Air 1
Operating System: iOS 10.3.3
Game Version: 2.4.5 (although the in-game title screen incorrectly shows 2.4.4)