Is it possible something in the growing conditions "forced" it to bloom early or prematurely? Has anything changed in your growing conditions or care routine since the last it bloomed? Perhaps it's been an unusually rainy and dreary year or particularly hot?
It is a variable and widespread species, so it doesn't surprise me to see variation in blooming season. However, I know my philly blooms in the spring and/or fall/winter as opposed to the middle of the summer. Plus, if you search the forum and look at the dates when most of our member photos are posted, it indicates that this time of year is a bit of a lull for P. philippinense bloomings in general. So maybe it just had an unusual out of season bloom session.
Just based on the leaves alone, I don't really see anything that immediately leads me to believe there are nutritional issues. How do the roots look and when was the last time it was repotted?