Hello there, I don't know if this is normal or not. Recently, I noticed that changing the pitch bend curve shape only changes it visually, but the pitch bend still sounds exactly the same (it's 100% verified, as I recorded all of them on the same two notes and then played the recordings together - it sounded exactly the same, like one single voice). It behaves like this with all resamplers and voicebanks. Everything in UTAU works completely fine, so I'm not sure if this is an issue or it works the way I described for all of you. I also noticed that most people (including me, usually) work with the default (S) curves, as they're versatile and with control points, they allow creating really impressive pitch bends.