User blog comment:Fistful of Force/Quick post: Supports, learn how to place wards on terrain./@comment-6003864-20130325192924/@comment-4794115-20130326071718

This has been in the game foreeeeever, it's not a glitch. If you can get the ward over halfway between the two ends of impassable terrain, it'll go to the other side. The same is true with jump abilities, if you can get at least halfway, you go through.

Note I said jumps, not dashes. Dashes have to go all the way through.