It was suggested in another thread that cruise control should work in rate and or acro+ mode. A question was raised about it in that thread, as it doesn't seem to work. You'll get a "red" error with "config" on the flight data screen.
After going days without a response in that thread I'm posing the question here in hopes of getting a response from one of the developers. Someone else also stated that it doesn't work for them either, so we're just seeking clarification.
Is it just a problem at our end, or is something not quite right in firmware 15.09 with regards to cruise control in these flight modes?