Does Charm Person ends if polymorph is cast on the charmed humanoid?

@LeMarcSharma @JeremyECrawfordDoes Charm Person ends if polymorph is cast on the charmed humanoid, changing its type to beast? nope, restriction applies to targeting – sticks after successful cast #wotcstaff

— (((Mike Mearls))) (@mikemearls) October 1, 2016