Strangely enough, we have had a late dormancy here for my mangoes and lychee too. Guess I should have expected it because weather was in the 80's almost all the way through December. Nice and cool now, except we've had record rainfall for January . . nothing usual about this winter.
Usually the mango tree flowers once in Dec. or January, and again in March. So far only one panicle of flowers has appeared. Hoping for a good bloom later in the spring! I had hardly any mangoes last year, too.