Background recording

I just bought TASCAM iXR + Cubase LE for iOS.
I am using iPad pro as music note.
So, Id’d like to show notes on iPad(using forScore) and simultaneously record my music practice by Cubase.
But once record started then change the app to forScore, cubase stopped recording.

is there any setting which enable background recording?

-Ken

There is no Cubase version for iOS. If you are talking talking about Cubasis, there is a dedicated forum for that.
I am using iPad pro as music note.

Thanks!