Does casting Polymorph on a creature break an active Warding Bond spell?

We had a recent event in our campaign where our Warlock used Polymorph (PHB p.266) to change another player into a Giant Ape.

I had Warding Bond (PHB p.287) cast on the player that was polymorphed. My question is about the mechanic of Warding Bond interacting with Polymorph.

Since the protection provided by Warding Bond is dependent on both the caster and creature wearing a platinum ring, is there anyway to maintain the Warding Bond spell while the creature is polymorphed?