I am sorry if my judgment is incorrect. After zooming the pic I saw some tiny white spots and also brown spot around the flower so thought of treating the plant first.
Well, my apologies for not checking with you first the maintainance and care you take for the plant.
I would like to just add one thing, check the soil. They don't like rich soil.
In my research I found that hyacinth works well in colder temperature and in neutral to slightly acidic soil.
Hope this helps!