Look very similar to your photographs but are somewhat lighter - though the differences may simply be about lighting in the photos. They are azalea lace bugs.

I was just reading more about them. Apparently azaleas and rhodies that are sited where they get more sun are more bothered by them.   That may be why my Koromo Shikibu is consistently more susceptible. It is positioned so that it gets more sun than the other azaleas.