Hey,
So I recently installed the plugin EcoEnchants and also its core plugin Eco and soon after I realized that the weapon attack speed override from OCM was gone. So I tried /ocm reload while holding a sword in my hand and the attack speed went back to pre-1.9 update and I tried hitting with it and everything worked fine. But as soon as I scrolled away from my weapon (changed the weapon/tool in my hand) every attack speed on every weapon/tool in my inventory went back to post-1.9 update.
Any ideas on how to fix this?

That sounds like something EcoEnchants is doing. OCM only sets the attack speed on login/logout or when you use the command.