If you Shove/Push a grappler grappling an ally, does it break the grapple at the cost of 1 attack?

@JeremyECrawford If you Shove/Push a grappler grappling an ally, does it break the grapple (because of reach) at the cost of 1 attack? RAI?

— Marc Sharma (@LeMarcSharma) January 25, 2017

Leaving the reach of a grappler does, indeed, end the grapple, as stated in the third bullet of the grappled condition (PH, 290). #DnD https://t.co/sMpDlsHkMB

— Jeremy Crawford (@JeremyECrawford) January 31, 2017