I wish I had recorded this, because I haven’t been able to replicate it.
I was using Lil’ Johnny Bronze and Tyri to farm treasure maps, and Tyri ended up dying so I was left with Lil’ Johnny Bronze.
The enemy team included some constructs and Dwarven Gates, so I had plenty of time to build up mana and spam Hook Me Up. I ended up using Hook Me Up at least 15 times. It didn’t generate a single Treasure Map. At 20% per usage, it’s improbable to not get 1. I also noticed the game stuttered/froze every time I used the ability. I’ve never noticed performance issues on my phone before.
I had fought against the team a couple other times, and Hook Me Up worked fine. I don’t know what happened this time.