Unexpected closed tag p and tag br solved (but not sure:-)

At first, very big thank you for plugin.

I had same problems as in topics
https://wordpress.org/support/topic/stop-removing-the-option-adds-empty-line?replies=5
https://wordpress.org/support/topic/tinymce-advanced-is-creating-lots-of-with-no-opening-tag?replies=1

All was doing in text mode

When I tried to save such code

<div><img src="path" alt="" />
<h4>Some text</h4>
</div>

I got

<div><img src="path" alt="" /></p>
<h4>Some text</h4>
</div>

When I tried to save such code
<div><img src="path" alt="" /><h4>Some text</h4></div>

I got

<div><img src="path" alt="" /><br/>
<h4>Some text</h4></p>
</div>

Several hours I tried to find code wich do this problem in your plugin and in core of wordpress in js files.
But this problem solved when in file tinymce-advanced.php on line 476 I commented string
//$c = wpautop( $c )

https://wordpress.org/plugins/tinymce-advanced/