From my time flying the Q400 I seem to remember the flaps were very temperamental
I've been flying the Q400 for 4 years and never had a problem with the flaps. The flaps are not temperamental, and such a throwaway comment from someone who no longer flies the Q400 should be disregarded.
There is an in-flight reset for a flap problem which is part of the checklist for such a problem.
Job well done to the crew involved.