Steps to reproduce the issue

in a content plugin onContentPrepare set scriptoptions via:

1. $document->addScriptOptions and
2. $document->addScriptDeclaration

Both are set correctly on the page

now enable cache
what you will see now is that addScriptOptions is only displayed on first page visit (page generated) but on second page visit (page from cache) the options are not on the page.

addScriptDeclaration works both on first page view and on page view from cache.

Expected result

$document->addScriptOptions should be stored in the cache

Actual result

$document->addScriptOptions is NOT stored in the cache

System information (as much as possible)

Joomla 3.9.12

Additional comments

I ran into this issue after migrating my custom javascript variables in my plugin from addScriptDeclaration to addScriptOptions following this guide: https://docs.joomla.org/J3.x:Adding_JavaScript_and_CSS_to_the_page#Adding_the_Options_to_Your_JavaScript_Code