Anker was bought a while back, and now most of their products are the same generic internals to everything else on the market. Sadly it's just e-commerce roulette to see if you get the dud chipset or if you're the lucky winner of a mostly functional product.

(the biggest offender here are USB hubs. Literally every single on on amazon (that isn't for a server rack) has exactly the same components just with a slightly different pcb layout)

edit: Here's a wonderful article wherein a nerd slowly loses their mind over this issue

I don't use anything Apple, so I can't speak on that, but I have never once had an issue with any other Anker product, and pretty much every accessory I have is Anker. You might try exchanging the charger to see if maybe you just have a defective one.