Dragging loops in to projects on GarageBand for iOS

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iOS & iPadOS

Hey guys,
So I'm on the iOS 9 GarageBand, yes I'm still there cuz my iPad Mini 1st generation does not support iOS 10.
Anyway, I'm having trouble dragging loops into my project. I double tap and hold and drag left, and sometimes I get it to work. Sometimes it interferes with other audio, and mutes the audio until it finishes its bars.
I was wondering, is there an easier way to drag lops into my song?
Thanks.

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