Galeforce does not work with special arrows like arrow of slowness. I play on prominence 2 hustarian era.

It was intended behavior since the galeforce arrows are quite powerful already, but I'll give it some thought to change that.

I noticed that in addition to the galeforce, the darkmoon longbow and simons bow also do this. Perhaps a config option to make it toggle option that defaults to working how it does now would be a nice way to handle it.

Sounds good, I'll do that.

Fixed in this commit. Will be live next update.