when save discount , category hidden

hi,
when I want add discount and select priduct for discount, when saved , category selected hidden.
please see movie:

Hi,

Download the install package of HikaShop on our website via the menu My account>My subscriptions and install it on your website. That should add the patch for that problem.

We did a lot of changes in hikashop component.as a result I cant install new package
please help

Hi,

If you did your changes via the menu Display>Views or by editing the CSS file via the HikaShop configuration like we usually recommend, you should not loose your changes when you update/install again HikaShop.

I'm not sure what was the fix anymore for that bug. You can try editing the file "form_restrictions" via the menu Display>Views for your backend template and change the line:
explode(',',@$this->element->discount_category_id),
to:
explode(',', trim(@$this->element->discount_category_id, ',')),

thanks ,great.worked