@zichich – “The source of the story in the OP is mentioned in the sefer “Shomer Emunim” by the former Shomer Emunim Rebbe [The founder of the Toldas Aaron & Toldos Avrohom Yitzchok Chassidus written at least fifty years ago. He was known as a tzaddik and oved Hashem. So the story is probaly true.”
That’s right. I knew this story as well, couldn’t think of where I read it before, but indeed, it’s in the sefer Shomer Emunim.