But by adding the super secret nowhere to be found Height attribute, magic happens...
*badadum*
<Tab Label="Issue Details">
<Group>
<Column PercentWidth="100">
<Control FieldName="WhatWentWrong" Type="HtmlFieldControl" Label="What went wrong:" LabelPosition="Top" Height="75" />
</Column>
</Group>
<Group>
<Column PercentWidth="100">
<Control FieldName="ReproduceSteps" Type="HtmlFieldControl" Label="Steps to reproduce the problem:" LabelPosition="Top" Height="75" />
</Column>
</Group>
<Group>
<Column PercentWidth="100">
<Control FieldName="ExpectedBehavior" Type="HtmlFieldControl" Label="What is the expected behavior:" LabelPosition="Top" Height="75" />
</Column>
</Group>
</Tab>
By the way, to prevent the Html controls, make te type of the field PlainText.
Cheers!

