Simucube Sport power brick noise

Hello everyone!

I have had my Simucube Sport since January.
The last 2 weeks the power brick started making a clicking/ticking noise which day after day increased in frequency. Now it sounds like in the video, you can barely hear it while passing by.

The way I operate it, is to press the torque off and shut down the motor every time my session is over, but leave it plugged in. The sound starts after I start driving and continues regardless if there is load or not, like in the video where noone is driving.
Is this sound normal? It is not troublesome volume wise, I’m just a bit concerned it started all of a sudden.