Help Please

[Gwen97]

Hi I'm new,
ThI've visited the sight a few times just for general care answers. This is my first forum post, sorry if i am not doing this right.
I have a jewel orchid, a phal, a bunch of mini brassavolas, a belitia, and a miltoniopsis.
All of them are doing fantastic, after a few hiccups with the phal, which was my first I have finally got the hang of orchid care....... except the miltoniopis.
Its been in SemiHydro since early May and has a great growing root system. But it hasn't done anything other than the roots. no new leaves, no new growths. I thought it was a fast grower. It lost an old leaf last week so maybe i'm just paranoid. Which brings me to the second issue, the roots are growing into the water reservoir should i be worried?

Any help is greatly appreciated, Thank you