Dear Radha,
The episode is mentioned by Priyadas (himself a Gaudiya) in his commentary (the Bhaktirasabodhinī, 1712 CE) on the Bhaktamāl (ca. 1600) of Nabhadas (Ramanandi). The modern commentator, Rupkala, gives further detail about the episode in his edition of the Bhaktamāl (which includes Priyadas's commentary). I will send a pdf of the section of the text on Mirabai, which includes the relevant episodes.
I'd like to acknowledge John S. Hawley, who introduced me to this part of the text years ago (he also created the pdf), and point out that James Hare's unpublished dissertation on the Bhaktamāl and Bhaktirasabodhinī is still the best scholarly source on these works.
Best,
Tyler Williams
University of Chicago