Product custom field values not saving in backend of product

-- HikaShop version -- : 4.2.2
-- Joomla version -- : 3.9.13
-- PHP version -- : 7.2.22
-- Browser(s) name and version -- : firefox mac
-- Error-message(debug-mod must be tuned on) -- : No error message present on the page

Hello,

I have a multi-select custom field added to a product. When I navigate to the back-end of the product, make a selection or two from the multi-select and save, some values save and some do not.

An example: Multi-select custom field name "Mounting" with the following structure.

Mounting
- Horizontal Mounting
- Vertical Mounting
- 1" Pipe Mounting
- 1-1/4" Pipe Mounting

If I select Horizontal Mounting or Vertical Mounting or both, the values save into the product. If I select 1" Pipe Mounting or 1-1/4" Pipe Mounting the values do not save. It seems like the double quote in the value is causing an issue. Perhaps the custom field values need to html entity encoded before they're placed into the option value="" in the DOM.

screenshots attached

Hello, I went into my subscriptions and downloaded hikashop but it's showing v4.2.2 which is the version I already had installed prior to reporting this bug. Does this download contain the bug fix I need even though you didn't increment the version number?

Hello, I'm not sure how you patched this but I need to report some more bugs here. ® ® breaks it. I'd recommend some kind of unit test here, testing your function against a variety of characters.

The ampersand (&) symbol also breaks it.

™ ™ also breaks it

Also something in this string breaks it: CAT 4, 40 cal/cm2