Buds blasting on Mormodes x Cycnoches hybrid

[bethmarie]

These spikes have been going like gangbusters for weeks. In the last 10 days or so, though, the top spike has dropped 4 buds and a couple more are turning yellow now.

Anyone know the humidity requirements of this group when dormant, but in spike?

Or have other ideas about the likeliest culprits for the bud blast?

Thanks!