iPhone 11 no longer allowing me to charge using my Anker Powercore
So up until recently I haven't had any issue charging my phone using my Anker device. I turn on the device and plug it into phone and it begins charging. But recently when I do these same steps, nothing happens and after a short bit the 4 blue lights on the Anker device go off and no charging happens. I have an open ticket with Anker about this, but today I decided to try connecting other Apple devices to the Anker to see what happens. I have an older Apple iPad and a really old iPhone 5c. Using the very same cable I am able to without issue charge those two devices. When I do the same steps with my newer iPhone, nothing happens. Doesn't seem to me like an Anker issue at all, but not sure why I can charge my iPhone no problem with adapter, cable and wall plug, but with the Anker not all all. Welcome any suggestions. thanks
iPhone 11, iOS 15