Just one glitch using the free app

The free Facebook app works fine and I recommend it. The desktop icon is very handy. The only bug I found is videos play fine in small frame, but the image goes completely black when full-screen is activated, the sound continues to play. After the video goes black it is not possible to go back to view the video in the small size. the image is lost for good, the video remains black even when reopening it. I see other reviewers noted this same problem using the upgrade Facebook app,

Howwoodie about FaceChat for Facebook Messenger, v1.5.1