If a platinum ring is removed and then replaced do the effects of Warding Bond resume?

Warding Bond has a duration of 1 hour and has a material requirement of

a pair of platinum rings worth at least 50 gp each, which you and the target must wear for the duration

If one of the two rings is removed does the spell end or are its effects merely suppressed? If the ring is replaced within the 1 hour duration would Warding Bond need to be re-cast or would its effects resume?