Thanks for checking!
I looked in case there were newer Buggybooz meshes, or in case the Shakerlicious set had another master of its own, and didn't find anything mentioned.
The pic is from a testing setup, which only has the KitchenBasic master counter available, I believe. Maybe I should start adding other parts of the set/s, and I might be able to discover what those bits of cupboard are linking to. For Science!
I appreciate you both looking into it.
Small update - there is indeed a Secret Master. I dumped my Shakerlicious collection into the test and those objects no longer flash blue. (It will take longer to find out which is the exact required piece, though.)