$batch request is not working, springboot 3.2.5

I am using spring boot 3.2.5 and i can't send the $batch request, I am getting "Missing close delimiter at line '0'." error. It seems like when I set content-type = "multipart/mixed;boundary=abc123", the body is always blank when i check in the controller. No problem with CRUD operations tho. Please let me know if I am missing anything.