Can't copy properly when using a Heading

[M@rc]

Affected version

2.3

See this test post:

https://xenforo.com/community/threads/another-heading-test.226861/

BB Code:

[HEADING=3][USER=282703]@tester12[/USER] - [URL='https://xenforo.com/community/forums/test-messages.6/']Test thread - new message![/URL][/HEADING]

Highlight it:


Now copy/paste it into the XF editor.

Only the first part is copy/pasted and published.

A workaround is to use the +Quote feature but some people like doing it the old fashion way.