Hi, sorry for my bad english,
If you are spinning with Warpath and instacast the Ring of Shields, you do not benefit from the On the Path node, you need to stop and restart spinning for it to take effect.
It’s annoying gameplay-wise but it’s also bad for mana economy when investing in the “Dark Nexus” node on Warpath because you are paying only the first spin with mana, so you add the Warpath initial mana cost to your Ring of Shield mana cost if you want to benefit from that node.
Hope that can aid.