[TYPO3-english] CKeditor problem after update to 8.7.6

[swanage]

After updating from 8.7.4 to 8.7.5 and finally to 8.7.6 Ckeditor gives me problems.

When changing format of text (not being paragraph, f.e. in heading 3) the text gets wrapped by the p-tag:

F.e. "test" shows:
<h3>test</h3>

source:
<p><h3>test</h3></p>

Anyone else having this same problem?