Bold, Italic, Underline creates <br>

[Myridor]

Everytime I click on Bold Italic or Underline it adds an
to the end of my text.

So the html looks like this if I click on Bold and Italic:

< p>Some of my Text< /p>
< br>
< br>

[ghost]

Same here, but worser. If I create a bold tag with one line break, then the result is this:
<b>bold text<br><br></b>
but when I delete all line breaks in editor (I find only one), then one
will stay in text and cannot be removed:
<b>bold text<br></b>
In editor is no line break anyway