Ok I’m joining the game :) my entries/guesses/suggestions
1) That is a purple torch with green tips
2) there is nothing wrong with it
3) put in low to medium flow and medium light
4) don’t feed it. Entice it to come out. It will be encouraged to extend for light if you don’t feed it.
5) broadcast feed the tank a few days in a row but don’t give any direct. Again, entice to come out. Let it smell the food blowing all around and think to itself, hey, I want that, I’m going to come out
6) agree - clearing aiptasia was definitly a smart move and could have caused this. Give safe stable conditions and it should come out. Looks like a nice one too