Setting showeditbtn to false breaks the original edit button

[RealFoxie]

How to reproduce:
set showeditbtn to false in the configuration.

Create a page with the following:

====== HEADER 1 ======
text
{{page>start:other_page}}
====== HEADER 2 ======
text that shouldn't be editable

and a page in start:other_page.

When pressing the edit button meant to edit HEADER 1, dokuwiki will instead show the editing page for HEADER 1 and everything under it (also HEADER 2). This should only show editting for HEADER 1, as the normal button for dokuwiki does.

Happens for any placement of the included section (above or below text).