Pop up window doesn't work

[AC Question]

Hi,
I have Facebook in the background and on top there's an Amazon pop up view.
On my S6 I could have watch a movie on Facebook and use the Amazon app, they both worked simultaneously . I just bought S7 and whenever I click the Amazon app Facebook video would stop, meaning I can't use 2 ups simultaneously. Same goes with the split screen.
Would appreciate assistance

Thank in advance
Lir