And what happens if you export a PDF/X-4 file and try to print that from Acrobat? Do you get a PDF file that views and prints correctly?
Most of us who are experienced with InDesign most strongly recommend that you always print via an intermediate PDF file. Acrobat's printing facilities are much more robust than those of InDesign.
I have experienced similar situations, which included many elements with transparent effects overlapping on a spread, and one element just dropping out on print and export. In my case, the workaround was changing or eliminating transparency of various elements, which you have tried yourself. This issue seems to be more of a glitch, than a bug. Unless you, or other user see a reoccurring pattern, I think this issue will be considered an anomaly.