Their mistake was corrected by the Lord. In this way, their Kṛṣṇa consciousness was awakened, and they could understand that a sannyāsī is simply a living entity and not the Supreme Personality of Godhead.
When Śrī Caitanya Mahāprabhu took His bath at Akrūra-ghāṭa, He submerged Himself in the water for a long time. Balabhadra Bhaṭṭācārya decided to take Śrī Caitanya Mahāprabhu to Prayāga after visiting the holy place known as Soro-kṣetra. While stopping near a village on the way to Prayāga, Śrī Caitanya Mahāprabhu fainted in ecstatic love. Some Pāṭhāna soldiers who were passing through saw Śrī Caitanya Mahāprabhu and falsely concluded that the Lord's associates, Balabhadra Bhaṭṭācārya and others, had killed the Lord with a poison named dhuturā and were taking His wealth. Thus the soldiers arrested them. However, when Śrī Caitanya Mahāprabhu regained His senses, His associates were released.