Squeaking in EBS system?

As I let off the throttle and the engine breaking kicks in there is a low pitched squeaking as the machine is coming to a stop. Is this normal? It sounds almost the same as the squeaking from the break pads when I use the hand break (rarely). Just want to make sure something isn’t wearing out of adjustment.

Now that I’m used to it I really like the EBS but hoping it won’t need extra service down the road. Previous machine(2007 450) needed nothing till 7000 miles/1000 hrs. Hard farm use.