When I added products to cart it's added succesfully but when i click on homepage the mini cart become empty. what can be issue??
finally I solved this problem by disable a module full page chache (https://github.com/GordonLesti/Lesti_Fpc) but till now i doesn't find what was the issue with it.
Problem was When I added the product it's added but when I click on homepage button or logo (load website main url) it display no iteme in mini-cart but when add another product it's show all products that added previously ..