On my webshop the add to cart using the default Luma theme is inconsistent working / not working.
If add to cart from frontpage, its not working, if i go to a product page and add to cart then both products will be added to cart, meaning the product i tried adding from frontpage AND the product i add from the product specific page.
I have tried looking in the console log to se if there is any ajax / js errors, but nothing is logged. Also nothing really shows anything in the error log i nginx.
I use redis for object cache, i have tried to disable redis just to rule out redis could be the issue.
I emptied all cache from Cache Management still not solved the issue.
I guess it could somehow be a session / cookie issue, but nothing really shows in the logs.
Any clues on what to look for ?