I bought this Grobya on a whim while buying other orchids in May of 2021 from Tarzane Group. When it arrived, it had two immature growths and a bunch of leafless bulbs, but no sign of future or former spikes that I could tell.
I've kept it in my refrigerated terrarium, which hovers around 70°F/21°C at night and stays below ~76°F/24°C during the day. It's watered daily and gets what I would describe as moderate light. While it was in active growth last summer, I hung a teabag full of Osmocote slow-release fertilizer pellets at the top of the mount in addition to my usual weakly-weekly fertilizing with MSU.
The two growths produced a bunch of leaves and became bulbous at the base and then very little happened... until late spring, when a new growth appeared. And finally, in late June, spikes emerged from last summer's growths! From spike to full bloom, I'd say it took a little over a month. A couple buds on the right-hand spike blasted, but overall I am very pleased with how this flowered.
Here is my attempt to capture the opening of the buds in a time-lapse. (My cats jostled the camera at the end while doing battle.)