Cannot level up Pocket's Flying Cloak while Cloak is flying

[Wombatarmy]

Trying to level up the ability while the cloak is flying will instead teleport Pocket, even if Pocket is inside Enchanter's Satchel. If Pocket is silenced, for instance during Ethereal Shift, the ability cannot be leveled up at all.

How to reproduce: As Pocket, activate Cloak (2), then immediately attempt to level up cloak with the default hotkey (ALT+2). Alternatively, activate Cloak, then activate Ethereal Shift, then attempt to level up Cloak.

Occurs 100% of the time