Phal dormant for 2 months?

[LightsCameraFlowerspike]

Although I don't know what may be going on within the medium, my phal seems to be dormant since I cut off the spike 2 months ago. Hasn't been showing any signs of new growth... usually when I cut off the spike there's a new leaf growing, or new roots begin to appear from the crown.

I really didn't think phals go through dormancy... any possible reasons for this? It gets enough light... all of it's brothers and sisters have been doing very well; growing news leaves, roots and such.. just this guy really hasn't been doing much.