When I see liverwort (bottom of your image) in my pots it seems like an indication of overwatering. But I also realize that you may want to keep azaleas wetter depending on your water quality to prevent mineral precipitation.
Do you use a systemic insecticide? The reason I ask is that I lost a very nice hinomaru to what turned out to be an infestation of root mealy bugs. When I received the tree it had an abnormal leaf curl, which at first I thought was due to temperature shock in shipping.
If the leaf curl gets worse, you might want to cut the wires and lift it out to inspect the root mass. If you see little white masses, you might want to immerse the root mass in a weak per solution.
That should have read “peroxide solution”. I do use Bonide on a prophylactic basis, but it takes time to wash into the roots. I was thinking of peroxide as a way to immediately douse an infestation. I also just recently started using Cleary’s systemic fungicide, mostly for the benefit of my crabapple and my Japanese flowering apricot [which in this part of the country is notorious for picking up pretty much every fungus or blight known to man]. I figured it can’t hurt the other trees, so it’s also now part of my treatment regimen.