CC Madhya 17.103
sannyāsīra saṅga-bhaye nā mānena nimantraṇa
Every day Śrī Caitanya Mahāprabhu refused their invitations because He feared associating with Māyāvādī sannyāsīs.
A Vaiṣṇava sannyāsī never accepts an invitation from a party who considers Māyāvādī sannyāsīs and Vaiṣṇava sannyāsīs to be one and the same. In other words, Vaiṣṇava sannyāsīs do not at all like to associate with Māyāvādī sannyāsīs, to say nothing of eating with them. This principle must be followed by the sannyāsīs of the Kṛṣṇa consciousness movement. That is the instruction of Śrī Caitanya Mahāprabhu, given by His personal behavior.