Unlike humans, trees don't have electronic calendars to tell themselves what season it is, and they don't set appointments to tell themselves when flowers, leaves, etc., should start growing. They tell cues from things like daylight hours, temperature, wind, etc.
Tropicals don't expect cold weather cues, so you can put a tropical tree inside a human oriented building and it won't be too disappointed in having no below freezing weather. An outdoor tree like ligistrum or a redbud expect winter season with cold air, cold soil, and very short daylight and long dark nights.
Your tree is confused. It has warm weather and long light periods and is reacting as if it is April. Different species react to untypical weather differently. Mostly, no winter will mean no more than two years of life. Some will last three years, some less.
