I have no login at CodeAstrology to create a ticket.
The issue can be reproduced perfectly well.
When I rollback to v1.6 everything works fine.
For now I will just stop updating your plugin.
When no values are set, code looks like:
<input
type=”number”
id=”quantity_61584dfbcc810″
class=”input-text qty text”
step=””
min=”0″
max=””
name=”quantity”
value=”0″
title=”Menge”
size=”4″
placeholder=””
inputmode=”numeric” />`
v1.6: still adds 1 product
v1.9: no product can be added, even when customer enters custom value for quantity, item will not add to cart
