Basically the same thing what originally was the case with the orig_fire arrows. It applied to all 3 types of OWWs: Left, right and down.
Would suggest to change the direction of the 3 arrow animations to be in line with the arrow tip.
Moved to Bugs & Suggestions, as this is the kind of thing I can fairly easily do myself rather than waiting for someone to do it - but I probably won't see it here as I don't very actively watch the styles board.
Fixed in commit 746434d.