My friend is playing as a cleric that uses a shield in combat. I am unsure of how the rules for sheathing/dropping weapons work. The way my friend is playing, he seems to be able to cast a spell and use a weapon attack on the same turn, but this feels wrong to me.
Is this loop allowed in the rules:
Combat starts: Uses action to attack and then sheathes/drops weapon (using free object interaction) Uses bonus action to cast spell with somatic component
2nd round: Uses bonus action to cast spell again, Uses action to draw/pick up weapon and attack.
Using this loop, the cleric can always cast a somatic spell (provided it is a bonus action), attack with a weapon, and benefit from shield AC every round of the combat. Is this right? Being able to draw/sheathe a weapon for free each turn seems to make the warcaster feat pointless (save for concentration buff)