This bug occurs in Internet Explorer 8 in extension WikiEditor.

Steps to reproduce:

• Open a long text with WikiEditor for example:

https://de.wikipedia.org/w/index.php?title=Wikipedia:Spielwiese&action=edit&oldid=127895879

• Scroll in the middle of the text.
• Position the cursor with the mouse in the middle of the text.
• Insert a text from the WikiEditor toolbar, for example the signature.

--> The textarea scrolls up a few lines.
The textarea scrolls also up a few lines, when you enter or leave the textarea.

Other versions of Internet Explorer are not tested. This bug doesn't occur in other browsers.

This bug doesn't occur in core editor.

This bug occurs since https://gerrit.wikimedia.org/r/109660

A workaround for this bug is
.wikiEditor-ui textarea#wpTextbox1 {
height: 390px;
}

JavaScript based patch is in https://gerrit.wikimedia.org/r/115349

Version: master
Severity: minor
Platform: PC