Hi,
I think that you have something which minify the javascript or maybe it's just related to JCE.
When HikaMarket retrieve the variant edition code ; there is an error near the end of the file with that code
<script data-cfasync="false" type="text/javascript" src="/index.php?option=com_jce&view=editor&layout=editor&task=pack&component_id=10141&wff0792efbc2c4188ae4ad4265e10c068d=1">},20);</script>
The content
should not be there.
It generate a javascript error and so, the rest of the script are not processed (for the upload, for the price edition, etc).
One solution for the moment will be to use another editor in the front-end (option that you can change directly in HikaMarket), so the javascript won't have any error.
You can easily see when there is a javascript error because the "upload" field is display below the image section, which is not the case when the javascript is right executed.
Regards,