Hi,
I think the issue is linked to this change we've made in HikaShop 4.7.0:
The input and select elements on the frontend now use the classes of Joomla 4 when using Joomla 4 instead of HikaShop's custom classes.
www.hikashop.com/support/documentation/5...ashop-changelog.html
Your template's CSS must have an issue with the code changes related to this point.
You probably just need to add a bit of CSS to sort it out, like increasing the width of these quantity input fields.
I suppose such CSS should help:
.hikashop_product_quantity_div input, input.hikashop_product_quantity_field{ max-width: 50px !important;}
We would need to be able to look at the problem directly on the website to be able to say if that would really be the best CSS in your case.