Little to none polyp extension is it my flame angel

[SWQuest]

Hi all like the title says I have little to none polyp extension, and I was wondering if it is my flame angel. All of my corals are growing witch are some monties, and acroporas. I do see my flame angel picking at them then when I come up to the tank he hides. My tank is a 120gal and all my tests are good alk 8
Mag 1400
Cal 420
Po 0.04
Nitrate 0
Salinity 1.024

Thanks