It is not common, but it has been seen to happen multiple times.
Do you know if those applicants had any issues at their interviews?
\\At least you are lucky because it is just rescheduled and only delay by 2 weeks. Other people
in similar situations get de-scheduled and don't know when it will be re-scheduled (please see my signature)
\\
WBH,
Do you know why that happened in your case? Were there any tricky questions during the interview or anything special with your case? Why the IO couldn't make the decision?