Closing filter Tag ignored in full version

Hi, i have this issue also with 6.x-1.x-dev

the following snippet:

if (value == 42) {
...
}

As yoda condition written:

if (42 == value) {
...
}

works fine in the preview trimmed version. but in the full version, the first closing javascript tag is ignored. instead i get this:
[/geshifilter-javascript]

and the following text is inside the javascript highlighting.

this is especially strange, because on other nodes everything works fine.

any ideas?