CC Ādi 7.46
sannyāsīra saṅge nāhi māne nimantraṇa
As a matter of principle, Lord Caitanya regularly accepted His food at the house of Tapana Miśra. He never mixed with other sannyāsīs, nor did He accept invitations from them.
This exemplary behavior of Lord Caitanya definitely proves that a Vaiṣṇava sannyāsī cannot accept invitations from Māyāvādī sannyāsīs or intimately mix with them.