It’s not a bug – it’s an undocumented feature.
Yesterday, 14/05/19 at 20:30 I had one event RIDE LIKE KING 11 Training Ride, Innsbruck:
The result for women was missed. I wish it could be fixed.
ZwiftPower was never setup to handle duplicated categories in an event. In this case there are Two "E" categories, so only one gets picked up at random.

A code update was planned but never implemented as it was a rare occurrence.
thanks for your answer.