Zac's Slingshot Needs New Rubber Band

Zac's jump is having some weird issues right now. No matter how long it's charged, it will sometimes launch him basically nowhere, like the range doesn't calculate or something, and he jumps in place. I haven't seen enough of it to try diagnosing anything, but it seems to happen about 40% of the time, and it MIGHT be triggered when he was to jump over terrain? I really don't know, but I thought I'd mention it here. It's been costing me and my friends a lot of ganks and engages lately.