Phal losing leaves but flowering

[Framalia]

Hi, I'm in Hawaii and have been growing orchids for a few years now. I have different types and have several phals. All my phals are flowering right now (day temp 70s, night temp mid 50s to 60s). They get morning sun then shade the rest of the day. They also get a nice breeze. I notice most of my phals' leaves are green with a hint of red or burgundy throughout. I've never seen that color on them before. This one phal has been steadily losing leaves over time. It began flowering several weeks ago and has large, beautiful purple flowers. Only 1 leaf remains and I don't see another leaf sprouting. I'm concerned that without enough leaves it will die. #1 should I cut off the flowers to save the plant #2 is the leaf coloring an indicator of something I need to fix to start getting more leaves. THANK YOU SO MUCH FOR HELPING ME. I REALLY DON'T WANT TO LOSE THIS BEAUTIFUL PLANT.