Thx for answer, but that do not solves the problem I have.
On Jommla 3 and Helix Ultimate 2.0.7 I placed two modules in the same module position [feature] and aligned them side by side via css. Works great. Both modules are placed here within the div with id="sp-feature" .
<section id="sp-feature-bottom">
<div class="row">
<div id="sp-feature" class="col-lg-12 ">
<div class="sp-column ">
<div class="sp-module offset">
<div class="sp-module-content">
<div class="mod-article-single single mod-article-single__offset" id="module_155"> ........ </div>
</div>
</div>
<div class="sp-module offset">
<div class="sp-module-content">
<div class="mod-article-single single mod-article-single__offset" id="module_153"> ........ </div>
</div>
</div>
</div>
</div>
</div>
</section>
If I do this on Joomla 4 and Helix Ultimate 2.0.11 the second module is placed here outside and after the div with id="sp-feature". The code looks so:
<section id="sp-feature-bottom">
<div class="row">
<div id="sp-feature" class="col-lg-12 ">
<div class="sp-column ">
<div class="sp-module article-single offset">
<div class="sp-module-content">
<div id="mod-custom212" class="mod-custom custom"> ........ </div>
</div>
</div>
</div>
</div>
<div class="sp-module article-single offset">
<div class="sp-module-content">
<div id="mod-custom213" class="mod-custom custom"> ........ </div>
</div>
</div>
</div>
</section>
As you can see, the 2nd custom module, which should actually be inserted inside the div with id="sp-feature", is only inserted after the closed div. Here, in my opinion, somehow faulty source code is generated.
I hope that I was able to describe the problem clearly.