Situation:
In an article with the Editor turned on, I select to insert columns, select 2 columns, the editor inserts 2 columns. I see the "col-md" class correctly in the code. However, as soon as I am in Editor mode and save the article, after switching to code, I only see the "col" class. As a result, the article layout is displayed incorrectly.

Correctly:

<div class="row" data-wf-columns="1">
<div class="col-md">aaa</div>
<div class="col-md">bbb</div>
</div>

Incorrectly:

<div class="row" data-wf-columns="1">
<div class="col">aaa</div>
<div class="col">bbb</div>
</div>

Solution:
The editor will not change the CSS class "col-md" to the class "col" after saving. It must keep the class "col-md" even after saving. The editor must not change predefined CSS classes in the code even if the user has defined their own.

Joomla 5.2.6
JCE Pro 2.9.84
Bootstrap 5.2.3 (Template)

The problem persists.

I also tried changing the code in bulk from "col" to "col-md" and just by switching from code preview to editor and back to code preview, this process changed the html code back to "col" (even without saving the article).

Solved, thank you Ryan.