Qwen 3.8 Flash chose a size but never got the shoes into the cart

Every step

1. 0:09StoreClicked “Aero Run 2 Light running shoes for everyday roa…”“I'm on the home page and can see featured products. I'll open the Aero Run 2 product page to start the purchase path.”
2. 0:14Product pageClicked “Choose a size”“I'm on the Aero Run 2 product page. The size dropdown is required, so I'll click it to open the options.”
3. 0:18Size chosenClicked “Choose a size 40 – out of stock 41 – out of sto…”“The size dropdown is open showing options 42 and 43 as in stock. I'll select size 42.”
4. 0:23Size chosenClicked “Choose a size”“The size dropdown still shows 'Choose a size' so my previous selection didn't take effect. I'll click the dropdown again to open it and select a size.”
5. 0:33Size chosenPicked “42”“The size dropdown is open showing options. I need to select size 42 which is in stock. I'll use the select action on the dropdown element.”
6. 0:44Size chosenClicked “Choose a size 40 – out of stock 41 – out of sto…”“The dropdown is open showing size options including 42. The select action failed because this is a custom dropdown, not a native select. I'll try clicking on the clickable element [11] which contains the open options to…”