Supporting Fire cooldown ishue

Your Supporting Fire skill breaks if you take the node from the Undying Hate jewel, specifically the Ambivalent Command Abyss Notable:

Minions have 4% increased Cooldown Recovery Rate per 10 Tribute

Minions lose 2% Life per 10 Tribute you have when following Commands

Most likely, it’s subtracting virtual life from that minion, and after a certain number of repetitions it disables the skill from the skill bar. Switching weapon sets resets the timer and restores the skill (though the cooldown fully triggers). Taking two Ambivalent Command nodes disables the skill twice as fast 🙂
Controls: keyboard and mouse, platform: PC.