I have Hue scenes triggered by Stringify. I noticed that when I set it up, Stringify saw the various scenes I have available, and also some that are just long strings of miscellaneous letters and numbers. There was a couple of times that I had to change the light in the flow to make sure that the correct scene was selected. It's been working OK since then.
My Hue bulbs are actually coming to Stringify via SmartThings instead of the Hue hub. I'm not sure if that makes a difference or not.