Illaoi Teleports into impassable terrain

When to one of her spawned tentacles there's a chance she becomes trapped between the tentacle and the impassable terrain. I was able to get out of the stuck situation by having a teammate come and move INTO my position.

Pretty sure it's this game. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2189120359/36501532?tab=overview