Warpath doesn't count as moving

So I was looking at warpath builds and couldn’t figure out why wings of Argentus was so popular. Turns out - “20% damage reduction while moving” is amazing.

However, as far as I can tell, Warpath doesn’t count as movement. I’m trying to test everything I can with the following results:
Transient rest - no ward when stopping Warpath, ward when walking normally
Stormtide - no shock when stopping Warpath, shock when walking normally
Eterra’s path - no vines when stopping Warpath, vines when walking normally

I’;m going to keep trying to find more, but this is enough to convince me that Warpath doesn’t count as moving and that wings of argentus does nothing for a void warpath build - can anyone refute this please?

Edit: to move to bugs