Try feeding it more.
I usually remove spikes from most of my plants after the first bloom, until they are full adults. Get to the good part faster, ya know? There is one exception, if growths start going out of sync, I let the precocious ones bloom and cut the spikes of the stragglers. Sometimes I'll even set a dummy pod to slow the early growths down until they line up again.
I don't think fertilizing speeds up or "makes" plants break out multiple growths at once.
My first SFG was purchased as a second blooming plant and the nursery owner said it was always painfully slow and he blamed it being half hangianum. The commercial growers usually go heavy with feeding. At least much heavier compared to how I do it.
He had multiple growths plant that was grown exactly the same way.
Some plants are super growers right from the start. Some take a bit of time to get there after a few blooming cycles. Others just never get there no matter what the growing conditions.
Hmmm....my delenatii and brachys that are growing a seed capsule are not slowing down one bit. They are all busy growing a new lead as usual and in the case of the brachys, they are breaking out growths and getting ready to bloom again all at the same time.
I think it really depends on the plants perhaps?
Not paphs, but my neofinetia that are carrying multiple seed pods are (two of them) sending up a few new flower spikes at the moment. It will be the second blooming since spring for one of them, and it will be third time for the other plant. The one that's going to bloom for the third time usually blooms three times a year for me (which is strange for neos) is the one carrying three seed pods.
Some neo growers snip off all flower spikes. I tell them this story and they just gasp. lol