Magento 2.2.4 (upgraded from Magento 2.2.3 successfully)
Steps to reproduce
Go to configurable product in Frontend and add it to Shopping Cart (e.g. 1 x T-Shirt in Size L and colour white ) In the same product, add another one (e.g. 1 x T-Shirt in Size M and colour red) to Shopping Cart
There are two products (1 x T-Shirt in size L and colour white and 1 x T-Shirt in size M and colour red) in Mini-Shopping Cart and normal Shopping Cart
By adding 1 x T-Shirt (L, white) everything is ok. But if I add a second T-Shirt (M, red) within the same product, in the shopping carts is shown 1 x T-Shirt in L, white and 2 x T-Shirts in M, red, although I only added one product each. The strange thing is, that if I refresh the site between adding the two T-Shirts, everything is shown correctly. That means: Adding first T-Shirt (L, white) to cart -> ok -> refresh the product site in frontend-> adding second T-Shirt (M, red) to cart -> everything is ok.
Can somebody reproduce this error?
Thanks a lot for your help!