Steps to reproduce the issue

Site with module Smart search published. Indexed.
Publish Article "Foo" with text "Foo bar foobarfoo".
Smart Search for the same text: "Foo bar foobarfoo"

Expected result

"Foo bar foobarfoo" to be highlighted, as in other popular search engines - with changed text colors only .

Actual result

"Foo bar foobarfoo" is highlighted, but with added spaces between words as in the following screenshot:

Devtools for the second word bar (EDIT: 'bar' inside 'foobarfoo'):

<mark data-markjs="true">
    <mark data-markjs="true">
        <mark data-markjs="true">
            <mark data-markjs="true">
                <mark data-markjs="true">
                    <mark data-markjs="true">
                        bar
                    </mark>
                </mark>
            </mark>
        </mark>
    </mark>
</mark>

System information (as much as possible)

Joomla 4.2.3
PHP 8.1

Additional comments

For larger articles text becomes almost unreadable.