It can be confused from the rule.
18.3a/2 – Playing Provisional Ball After Search Has Started Is Allowed
A player may play a provisional ball for a ball that might be lost when the original ball has not been found and identified even if the three-minute search time has not yet ended.
For example, if a player is able to return to the spot of his or her previous stroke and play a provisional ball before the three-minute search time has ended, the player is allowed to do so.
If the player plays the provisional ball and the original ball is then found within the three-minute search time, the player must continue play with the original ball?