BUG: Chain push into wall uses pit rules?

Had a weird string of events in a game this evening.
On turn 13 my wardancer blocks a dwarf runner who's holding the ball. I get defender down, which I select. All 3 squares behind him are filled with players, and behind them all are walls - so no-one can get pushed anywhere. The game still asks me to select a destination to push him though - so I select to push him into my opponents werewolf (and I elect to follow up). The dwarf falls over where he is, and is injured (I think - or KO'd, not sure which) - but I don't think there was any roll for armour. The ball bounces once, over to the werewolf - but teleports out (as if it had fallen into a pit?) and reappears at a teleporter pad.
Possibly the game somehow switched to treating the push event as a push into pit event?
On turn 13 my wardancer blocks a dwarf runner who's holding the ball. I get defender down, which I select. All 3 squares behind him are filled with players, and behind them all are walls - so no-one can get pushed anywhere. The game still asks me to select a destination to push him though - so I select to push him into my opponents werewolf (and I elect to follow up). The dwarf falls over where he is, and is injured (I think - or KO'd, not sure which) - but I don't think there was any roll for armour. The ball bounces once, over to the werewolf - but teleports out (as if it had fallen into a pit?) and reappears at a teleporter pad.
Possibly the game somehow switched to treating the push event as a push into pit event?