[Unity 2018.2.11] Why does post processing effects not work/ work differently after build than in run mode?

I’m currently trying out the post processing stack of unity and it works fine when im in scene & run mode, but when I build the game, it doesn’t seem to work properly.

I only have 1 camera in my scene, and my quality settings are set to ‘Fantastic’.

With post processing working in run mode:

https://www.screencast.com/t/aGDHSHVWU

Without post processing working properly in built mode:
https://www.screencast.com/t/IfReaDhJjb

Are you sure you set your target platform default quality to the same quality ?

125666-screenshot-2018-10-05-at-203420.png

This many not be the Quality.