Encores are not always in bloom. They bloom -as expected- in Spring and then produce two more flushes (smaller ones for me) during the growth season. Expect another flush in June-July (or so) and then a final one in September.

I only fertilize in early spring and only sometimes. Estabished azaleas feed off the decomposing mulch; that is all they need.

Watering can be done using the finger method. If the soil feels almost dry to a depth of 4" then water the soil with about 1g of water early in the morning (you can water manually, use a sprinkler or drip irrigation). And yes, yellow leaves could be a moisture issue but it could also be a host of other things as well. That includes planted too low and old leaves about to die. If you have just a few, that is ok.

But if it is a lot then that needs to be researched further. Signs of trouble for me would include: a lot of leaves yellowing or leaves yellowing only in certain parts (the top of the shrub only, say).