Flower issue with maudiae type - stuck bloom?

[indigi]

I hope everyone's new year is going well. Mine is, for the most part, though I seem to have a problem with one of my paphs.

The flower bud had been big and plump from about mid-December, then finally - barely - started to open on Boxing Day. I've read that it can take a while for the flower to fully open up so perhaps I just need to be patient, but it's been exactly this opened since New Year's Eve and isn't progressing at all.

I've seen siblings of this plant in full bloom and none of them looked like mine, especially the reflexed petals - the others were fully extended and a bit longer than these. I was wondering if I did something wrong (culture [though it's been in the same spot at a consistent temp/humidity all through bud and spike], fertilization regime), if it's some sort of disease/pest that can cause it not to fully open, or maybe I just bought a dysfunctional plant that will always put out tight, closed little flowers.

I can provide more info or pictures if they would be helpful, so feel free to ask. Any advice or insight anyone can give me would be appreciated!