jQuery Error when Tags Dropdown is Enabled

Hi,

This a great plugin. However, there are a few concerns I wish to draw your attention to.

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1. I’m facing the following error to the developer console when there are multiple tags to be selected from the dropdown.

Uncaught Error: Syntax error, unrecognized expression: option[value="["books","tease","visit"]"]
    at Function.ea.error (jquery.js?ver=1.12.4-wp:2)
    at ea.tokenize (jquery.js?ver=1.12.4-wp:2)
    at Function.ea [as find] (jquery.js?ver=1.12.4-wp:2)
    at n.fn.init.find (jquery.js?ver=1.12.4-wp:2)
    at new n.fn.init (jquery.js?ver=1.12.4-wp:2)
    at n (jquery.js?ver=1.12.4-wp:2)
    at HTMLSelectElement.<anonymous> (jquery.usp.core.js?ver=20200817:93)
    at Function.each (jquery.js?ver=1.12.4-wp:2)
    at n.fn.init.each (jquery.js?ver=1.12.4-wp:2)
    at usp_cookie (jquery.usp.core.js?ver=20200817:77)
ea.error @ jquery.js?ver=1.12.4-wp:2
ea.tokenize @ jquery.js?ver=1.12.4-wp:2
ea @ jquery.js?ver=1.12.4-wp:2
find @ jquery.js?ver=1.12.4-wp:2
n.fn.init @ jquery.js?ver=1.12.4-wp:2
n @ jquery.js?ver=1.12.4-wp:2
(anonymous) @ jquery.usp.core.js?ver=20200817:93
each @ jquery.js?ver=1.12.4-wp:2
each @ jquery.js?ver=1.12.4-wp:2
usp_cookie @ jquery.usp.core.js?ver=20200817:77
usp_remember @ jquery.usp.core.js?ver=20200817:122
(anonymous) @ jquery.usp.core.js?ver=20200817:73
i @ jquery.js?ver=1.12.4-wp:2
fireWith @ jquery.js?ver=1.12.4-wp:2
ready @ jquery.js?ver=1.12.4-wp:2
J @ jquery.js?ver=1.12.4-wp:2

Screenshot URL:
https://ibb.co/KGBYp9X

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2. A Custom checkbox still treated unchecked in case the error above fires or a proper image size doesn’t meet (?usp-error=height-min,required-checkbox)

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3. Why does the appearance of the Tags/Category dropdown changes on postback if there is an error?

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4. How to keep all categories selected despite they are added at a later time? From the plugin settings -> Click to view/select categories -> Select categories to display in the Category field.

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Steps to produce:

Default theme TwentyTwenty

Form: Default form by USP

Post Tags: Enable and require

Use Existing Tags: Checked (Check this box to display a select/dropdown menu of existing tags (valid when Tag field is displayed))

Custom field: Added

Minimum image size required. I have 900×600.

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The form appears in a good state when it is loaded the very first time. However, in case of an error, the issues appear when there is ?usp-error=anything parameter in the URL.

There is no customization done and all fields are default.

Do let me know.

Thank you.