it doesn't happen always, but when i add products to the cart some other products disappear!!
I've this extension called "Related / Dependent options 2.4.6" which link product options like size with color and so..
my OpenCart version 18.104.22.168
The most generated errors being found on Opencart forum originates from contributed programming. The increased counters are caused by posted redundancies of the same solutions that were already provided prior.