I'm not sure if this is worth noting, but after my upgrade, I opened some old projects I was working on and when I putting some stuff into a comsposite, the effects literally had no effect. All kinds. Brightness & Contrast. Chroma. YOu name it.
I calmly elected to close the composite and re-create a new one and it was worked out fine.
I'm trying to see if I can replicate it again.