Video link/preview disappears after editing existing post

[efelon]

Humhub 1.0.0-beta.3
Firefox 40.0.2
Windows 7

Reproduce:

• Create a post with content:

Video1:
https://www.youtube.com/watch?v=ia6OvV9aBzg

• Save Post
  • Post with video preview is visible.
• Edit Post and add another video link in the first line:

Video2:
https://www.youtube.com/watch?v=fciQpDDsAjw
Video1:
[...]

• Save
  • Video link/preview of videolink1 is gone.

[kevmax]

Can confirm the same / similar: Make a post- type some text and paste in video link.
Both display fine. Then edit the post , and ONLY change the text and click save - only the text remains - the video 'disappears'