I wrote to the programmer, nothing to do with the cache. Here is what he replied.
Let's look at the product
https://etg.crm-onebox.com/admin/shop/products/8175/edit/Status "Syant out of production"
In the opencart for this product, the following is
programmer remarks "The product does not have a status. So the cant from the CRM side, the status is not filled" and also "Well, OpenCart, then what if these products have a status of 0 if they are not on the warehouse. There are two statuses -
First - on and off
The second one is shown when the item is on but the quantity is 0"
I do not quite understand what is the problem? it turns out that for one warehouse value "0" we have several statuses "Waiting", "Out of production" and "Out of stock". And opencart does not understand what status to assign in this case, or what ??
In any case, he says that the problem is 100% in the transfer of data from the CRM. value is either there or it isn't. In this case it is not