Steps to reproduce the issue

Create a module in Cassiopeia of the type 'top-b' (or 'bottom-b'; this issue applies to both modules)
Set the title to 'Show'

Expected result

Visible title

Actual result

No title:

System information (as much as possible)

Joomla 4 Alpha 11 full package nightly from 30.08.2019

Additional comments

Index.php shows the code for this module is exactly the same as for the adjacent 'top-a' except for the style, which is 'card', rather than 'cardGrey':

    <?php if ($this->countModules('top-a')) : ?>
	<div class="grid-child container-top-a">
		<jdoc:include type="modules" name="top-a" style="cardGrey" />
	</div>
	<?php endif; ?>

	<?php if ($this->countModules('top-b')) : ?>
	<div class="grid-child container-top-b">
		<jdoc:include type="modules" name="top-b" style="card" />
	</div>
	<?php endif; ?>

The only difference being that top-a has a grey background. (I'm not sure where "cardGrey" comes from as it is defined as "card-grey" in both the minified and unminified template.css files.)

There are two Chromes for modules which, under the new system, are in html -> layouts -> chromes cardGrey.php and default.php, which differ only that cardGrey.php includes the class card card-grey and the default just `card

There does not appear to be any instruction to say - "do not display the title".
If there is, where is it and how can it be overridden?