We are using T4 Template Framework (T4_bs5_blank) and the pull down menus that work when switching to Cassiopeia do not work with T4 Template Framework.

The HTML source for that pull-down is as follows:

<div class="dropdown questions_tabs" data-filter="tab" data-section="1" data-topic="2">
	<button class="btn btn-secondary btn-sm dropdown-toggle" type="button" id="tabsButton2" data-bs-toggle="dropdown" aria-expanded="false">Recent</button>

<ul class="dropdown-menu" aria-labelledby="tabsButton2">
	<li><a href="/omitted_path/support?tab=recent" class="dropdown-item questions_tab active" data-tab="recent">Recent</a></li><li><a href="/omitted_path/support?tab=oldest" class="dropdown-item questions_tab " data-tab="oldest">Oldest</a></li>
	<li><a href="/omitted_path/support?tab=unanswered" class="dropdown-item questions_tab " data-tab="unanswered">Unanswered</a></li><li><a href="/omitted_path/support?tab=resolved" class="dropdown-item questions_tab " data-tab="resolved">Resolved</a></li>
	<li><a href="/omitted_path/support?tab=unresolved" class="dropdown-item questions_tab " data-tab="unresolved">Unresolved</a></li>
	<li><a href="/omitted_path/support?tab=open" class="dropdown-item questions_tab " data-tab="open">Open</a></li>
	<li><a href="/omitted_path/support?tab=pending" class="dropdown-item questions_tab " data-tab="pending">Pending</a></li>
</ul>
</div>

When the button is clicked, the source changes as follows (for Cassiopeia):

<div class="dropdown questions_tabs" data-filter="tab" data-section="1" data-topic="2">
	<button class="btn btn-secondary btn-sm dropdown-toggle show" type="button" id="tabsButton2" data-bs-toggle="dropdown" aria-expanded="true">Recent</button>

<ul class="dropdown-menu show" aria-labelledby="tabsButton2" style="position: absolute; inset: 0px auto auto 0px; margin: 0px; transform: translate(0px, 33px);" data-popper-placement="bottom-start">
	<li><a href="/omitted_path/support?tab=recent" class="dropdown-item questions_tab active" data-tab="recent">Recent</a></li>
	<li><a href="/omitted_path/support?tab=oldest" class="dropdown-item questions_tab " data-tab="oldest">Oldest</a></li>
	<li><a href="/omitted_path/support?tab=unanswered" class="dropdown-item questions_tab " data-tab="unanswered">Unanswered</a></li>
	<li><a href="/omitted_path/support?tab=resolved" class="dropdown-item questions_tab " data-tab="resolved">Resolved</a></li>
	<li><a href="/omitted_path/support?tab=unresolved" class="dropdown-item questions_tab " data-tab="unresolved">Unresolved</a></li>
	<li><a href="/omitted_path/support?tab=open" class="dropdown-item questions_tab " data-tab="open">Open</a></li>
	<li><a href="/omitted_path/support?tab=pending" class="dropdown-item questions_tab " data-tab="pending">Pending</a></li>
</ul>
</div>

Can you offer any solution to this glitch?

Joomla 4.2.7
T4 Blank Template Bs5 1.1.7
PHP 8.0.27