Making changes to Instance Panel Document removes one of the DIVs

When making changes to the Instance Panel Document via the AdminFE, it removes the div that wraps around the contents that happens to contain the padding rules to keep the front end looking uniform.

Just made a change a few moments ago and would have expected it to save:

<div style="margin-left:12px; margin-right:12px" class="instance-panel"><p>Welcome to the Land of Kittens <a href="https://pleroma.social" rel="noopener noreferrer nofollow">Pleroma</a> Instance!</p>...</div>

but instead, I get:

<p>Welcome to the Land of Kittens <a href="https://pleroma.social" rel="noopener noreferrer nofollow">Pleroma</a> Instance!</p>...