Yeelight Lightstrip 1S Adapter Buzzing Issue in Standby Mode

Hello,
I’m using a Yeelight Lightstrip 1S, and I’ve noticed that the power adapter emits a strange buzzing noise whenever the lightstrip is turned off.
As soon as I switch the lightstrip on, the noise disappears.

I contacted a local retailer who sells your products, and they told me to submit a topic in this Yeelight forum, asking for a new adapter, because we have to unplug it from the socket every night.

Could I request a replacement adapter or service check? Are all adapters supposed to make this noise when the lightstrip is off?

Thank you.