Summary:
1. I had point booster, ogre axe, and wizardry staff in inventory while in egg form.
2. Courier delivers final piece of blade of alacrity to egg and combines into aghanim's scepter.
3. Phoenix reborns from egg, from there on Sun Ray skill is darkened, and pressing the skill displays the message "Skill is inactive", while Toggle movement skill is available but does nothing when it is pressed.
4. The bug persists even after death and respawning, the skill remains unavailable.

To reproduce:
1. Go to hero demo mode using phoenix
2. activate supernova
3. immediately buy aghanim's scepter into inventory
4. see sun ray skill disabled upon completing the ultimate