Sound as there may be air trapped inside the filter somewhere.
Try and see if you can dislodge the air bubble thatās trapped by shaking the filter a little bit or taking it apart and reads long it again.
Some filters do make a noise when thereās air trapped somewhere and makes an annoying noise.
I have had this on several filters in the past and just a case of finding a way to dislodge the air bubble, when you do water changes in future, am sure youāll find a way to prime the filter more to ensure no air gets trapped.
Basically a case of trail and error until you find a method that stops the air getting trapped.