Onc. ornithorhychum

[silken]

I agree that it appears to not be getting enough water for some reason, be that bad roots or just too dry. If this is the pink flowering one, it's name has been changed to Onc. sotoanum. Onc. ornythorhychum is actually a yellow and brown small flower. The pink ones are still often called that but it was misnamed. Back when the yellow one was being named, the wrong photo was submitted and since then the pink one was called ornythorhychum in error.

I have Onc. sotoanum, the pink one and it has bloomed twice now as a plant around the size of yours. It bloomed last year in Nov. and this year in Sept. Mine does get pretty high light and has sort of lime green leaves. Yours look a bit darker which may indicate less light although photos can be deceiving. I do grow mine in pure sphagnum moss so far and it seems quite happy. I got it a year ago and it was potted that way and looked robust so I decided to leave it. I never let it get totally dry but close and then I water well. It is also very under potted and to me yours looks a bit over potted which can lead to root rot. However, if your roots are filling the pot, then it should be fine.