[AkaInuHime]

You can use annorum wind runner to get into walls. It doesn't seem to check collision with terrain or enemies at the final tile when using it, like you'd expect compared to how sidecut works.

Also, forest fiend's description says it lets you target a tile, but it doesn't actually let you use it on a tile without an enemy on it (which would be useful for destroying plants like cherry blossom, as well as lining up the annorum aoe to hit multiple targets).
(Also, the annorum version doesn't display a circle when you're selecting where to aim it, only a single tile. Not strictly a bug, but it seems off compared to how, for example, charge mind rye shows the full aoe area).

Using frigid arrow on an ally standing on a rain trap damages them.

[Neus]

These have been corrected in 2.88.