It may be a keiki root or if you were watering those roots so the keiki would stay healthy, it just may have stimulated the node to grow a root. You can cut canes and lay them down and they root to start a new plant, so its not impossible to see roots, although I never have before on an upright growing cane. I think the nodes have cells that are more ready to do something so this time it was a root!
As for blooming, I give mine a cooler, dryer (not bone dry) winter with good light and it blooms every year. Sometimes better than other times.
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