Huh -- this one usually isn't shy with fragrance -- but it was fragrant before? Fertilizer, especially an organic one with micro-nutrients beyond the usual N-P-K, might help, but don't pour it on in an attempt to bring on the scent, regular strength should be fine. Regular watering is also important, especially when it's mass blooming.

Hope this helps!

Jim

Have you at least noticed a (or more of a) fragrance in the evening from the flowers?

You may have been cursed with one individual plant with genetics of not producing as much fragrant oils, or is specific to temperature or time of day.

I've smelled a Madison confederate jasmine in a nursery pot that was perfect, but a large established vine at same time with hundreds of flowers be barely fragrant. ?!