Ajax Cart showing configurable product image instead of simple product

Question

I am using ajax cart and minicart shows configurable image instead of simple image.

Already Set Product Thumbnail in

Stores -> Configuration -> Sales -> Checkout -> Shopping Cart -> Configurable Product Image

Answer 1

I added this code after Add to cart controller and its working fine.

$session = Mage::getSingleton('checkout/session');
$quoteId = $session->getQuote()->getId();
$session->clear();
$session->setQuoteId($quoteId);