Jazzy Chord Progression 6-2-7-3maj - Jill Scott-esque

Jazzy Chord Progression 6-2-7-3maj - Jill Scott-esque Eb minor/Gb Major Gb =1 Variatons of this progressions feature in 'He loves me' by Jill Scott' The Bass causes me a problem as when it comes to chord seven, the 1-5-8 bassline contains a (flat 5) when played as a diatonic occurance. Conversations I've had and when listening to the track 'He loves me' shows that the bass should play (perfect 5th) during the chord 7. My ear still needs to adjust so I've recorded this with the (flat 5).