Hi,
I actually did a few tests and at first I didn't see any issue.
In fact, I only saw the issue after I used the start and end date filters at the same time.
And I found out why.
The line:
$filters[] = 'b.order_created > '.(int)$filter_start. ' AND b.order_created < '.(int)$filter_end;
which should be after the code:
$filters[]='b.order_created > '.(int)$filter_start;
$pageInfo->filter->filter_start=(int)$filter_start;
break;
default:
$filter_end = hikashop_getTime($pageInfo->filter->filter_end, '%d %B %Y');
$pageInfo->filter->filter_start=(int)$filter_start;
$pageInfo->filter->filter_end=(int)$filter_end;
in the file administrator/components/com_hikashop/views/order/view.html.php had been removed while fixing the different issues with these filters for the 4.2.2.
I've added it back and now it's working fine too when you have the two date filters used at the same time.
I've added that patch on our end so you can just download the install package on our website and install it on yours to get that patch.