Firestorm + Overabundance (+1 to Limit) doesn't work

When opening the full details for Firestorm it does show "Firestorm limit 2", which suggests it would work.

Easiest way to know it doesn't work is by casting it in one location, and then another. As soon as you do the second cast, the first one will immediately stop.
Please fix this

What an annoying bug - I understand it'd be kind of OP but then say "max limit 1 firestorm" instead of "limit 1 firestorm".
Although I would much rather prefer they simply fixed this.
Edit: Although now I notice this is the PoE1 forum and now I don't know how to delete my post... ugh