Not sure if it will grow a new leaf at the top or not as this hasn't happened to me personally nor have heard from others. However, three things do strike me.
1.) What is the balance of the fertilizer you are using and are you doing it as instructed on the label? Generally speaking, we tend to cut the recommended amount in half in the amount of water they recommend. So "weakly, weekly." Dang it though, I can't remember the appropriate balance at the moment so I hope someone can chime in on that.
2.) If you bought yours in bloom in June or July, it may either produce spikes later than others due to whatever species used to make it, or it may have been forced to bloom and could potentially skip one year. They typically bloom once a year in the later part of winter throughout spring, but there are some that bloom at other times of the year. I'm guessing it is spending time recuperating from the leaf issue and it may just skip this year, but I have some that are just now starting to send out spikes so you never know.
3.) Does your orchid feel temperature differences so it knows the difference between winter and summer? We try to let our Phals feel temps as low as 60F generally speaking for a few weeks. The lower night temp tells them what season it is and helps them to realize when to initiate their flower spikes. However, generally they say if an orchid isn't blooming then it's typically an issue with light (too low), not enough humidity, fertilizing issues and/or temperature problems.
Hope that helps a tad.
Paul McMahon
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