UR22 Preamp Issues

Hey everybody. I own the UR22 and I am having a weird issue when I use my sE X1 condenser microphone with it. I get a low rumble helicopter-like pulse. I’ve tried both preamps and it happens. Now, I feel like it is an issue with the microphone but I’ve tested it on other devices and don’t have that issue. I’ve tested my crappy M-Audio Nova on the UR22 and don’t get that rumble so I am curious as to what may be the issue. Also, I have tried different microphone cables which proved to not be the issue. Any ideas?

[I’ve contacted my support for it which recommended a repair but I was unfortunately outside of my warranty for repair]