context-in-play-function does not check invocked element type

[maxired]

Describe the bug
The new context-in-play-function returns an error when calling play() function on a object which is not a story.
I don't think this should be the case

Expected behavior
I expect the context-in-play error to be triggered only when called against a story element

Screenshots

[yannbf]

Thanks a lot for opening this issue @maxired !