Subflow and Alexa Local not compatible?

Some of my flows are getting well populated, so making subflows out of some of them sounded like a solution.

But, when I make a subflow that includes an Alexa Local node, I had to tell Alexa to discover the devices again. but after a day or two, Alexa loses the connection and I have to do a 'Discover' again. When I moved those subflows back to the main flow, yes, Alexa once again had to be told to 'Discover', but she doesn't forget my devices when they aren't defined in a suibflow.

Anyone else notice this, or is it just me?