I've also seen active growth while either blooming or just about to bloom. One of my phals produced 2 new leaves while simultaneously launching forth an aggressive spike and bud campaign. It was super happy at the time and gave me a phenomenal show this past spring.
However, it fell victim to over watering and funky moss. I didn't realize that I should have changed the moss after the last blooming, as store bought potted phals are usually over packed with moss.
Anyway, I re-potted it with fresh moss, loosely packed, and already I'm seeing a new leaf sprouting forth. I'm hoping it will fully recover and once again have another fine stretch of multi-tasking.