Not just corners leading to the opponent's shrine but it seems reckless flight gets broken if it rolls a direction that is unpathable then doesn't do the 2nd roll.
lumbering goes 90% (estimation, no hard number) of the time in the same direction: anticlockwise towards the shrine. The other 3 directions seem to have around same very small chance. Since there is only 1 single direction the champion favors by a high amount, it is very easy to get stuck by 1 single obstruct for many rounds. Im not sure, but I think in the past, lumbering units favoured both clockwise and anticlockwose direction towards the shrine equally with a small chance at the other 2 directions. This caused a much more fluent and less predictable movement.
Except it didnt use to be this bad. This is the worst ive seen reckless flight in a while . They get stuck on almost every map with a wall.
Yes, as I said in my second alinea, I think it got changed. But I cant tell when, since i hadnt played for like years until a few weeks ago.