Add to cart button sometimes dosn’t show

Hi,
In my store,
Sometimes after I order a product then I try to order again, I can’t see the (Add to Cart) button.
Please see this video for what I mean.
https://drive.google.com/file/d/18afou-H_xr9Hqur6YQoff81Jttx2Y1Mq/view?usp=sharing
For this item:
https://www.madwabmall.com/ar/product/%d9%81%d8%b3%d8%aa%d8%a7%d9%86-%d8%aa%d8%a7%d9%8a%d8%ac%d8%b1-%d8%a7%d8%a8%d9%8a%d8%b6-%d9%88%d8%a7%d8%b2%d8%b1%d9%82-%d9%84%d9%84%d8%ad%d9%81%d9%84%d8%a7%d8%aa/
If I go to inPrivate Browsing in Edge I can see the (Add To Cart) button.
Thats strange
Please check
Thank you