You might consider trying other flavors. I use a fair bit of DIY flavors at times. I prefer unflavored but sometimes I like a peppermint, maybe a coffee. Swapping flavors up from time to time helps me avoid getting too much of one in particular.
As a boy my grandfather let me eat a whole apple pie. I got sick. My grandfather asked if I learned. Told him I learned to not eat a whole pie at once. He told me to remember
there can always be too much of a good thing. This can apply flavors and vaping.
Your taste buds can get sick of a flavor, or unflavored. Been vaping four to five years now. Used to like a juice called Hawk Sauce. Not had any of it for quite a while now. Life has led to it costing more for one thing. For another I got "burnt out" on Hawk Sauce.
Think if you start swapping flavors out you'll find your tastes will gradually return. Pineapple will start tasting yummy again. Other foods, vaping flavors will too. Barring that I also suggest hydration being relevant. Even having physically limited taste myself, vaping can dry me out and nothing will taste good.
Water can neutralize flavors. It also helps regulate body temperature, flushes kidneys, liver. There's plenty of reason it is called a universal solvent. Water can sole a lot of problems. But again just remember to not over do a good thing.