[2020] Urzil's Pride / Jugg Stance interaction while in Warpath

I’m pretty sure everything is working as intended here. While channeling Warpath, you had 30 mana regen because of Dark Nexus. When you activated Juggernaut Stance you gained 50% more armor, and jumped to 37 mana regen thanks to Urzil’s Pride. When you de-activated Juggernaut Stance, your mana regen dropped back to 30, because your armor went down.