Hmm. I've heard of others having this issue, but it's odd that yours got fixed and mine didn't.Cannot reproduce that one here. I had it in some 26.0 betas but it's been fixed since 26.0 (final) for me and never came back.
My icons which control individual Hue bulbs work until a reboot (i.e. a proper reboot, not just the restart a beta install does).
They just show the generic Home icon, although editing it shows it's still configured for the correct bulb. However, I need to change the config, save the change, and then change it back to what it should be, before it works (until the next reboot).