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?
This question was prompted by reading Does casting the Polymorph spell on a creature break an active Warding Bond spell affecting that creature?
If an in-game example is important, however, imagine Melthior and Sir Bartus are a couple of bros hanging in a park. For a lark Sir Bartus casts Warding Bond on Melthior and at the same time gives Melthior a platinum ring as part of the casting. They spend 15 minutes goofing about before Melfior is like "Hey Bartus, cool spell and all but I gotta scram. Here's your ring back" and removes the ring to give back to Sir Bartus. At that moment however Viscardi and Kalrook, a couple of local ruffians, arrive and make clear their intention to skirmish. Recognizing the danger Melthior replaces the platinum ring upon their finger. Does Sir Bartus need to re-cast Warding Bond in order to protect his friend or is the spell still effective once the ring is replaced?