2015 Kia Forte why does the gas gauge flash and shows empty shortly after fill.

What is your question?

2015 Kia Forte gas gauge flashes and shows empty shortly after fill up. Car originally shows full tank and then after one or two starts or while driving the gauge drops and either shows low miles/ fuel or the -- and flashing gas light.

What makes this problem better or worse?

Check engine light for emissions has been on for a while already replaced gas cap.

How long has your 2015 Kia Forte had this problem?

has happened about 6 times over the past 2 months