Zigbee Osram Plug Phantom switching

Hi all,

my Osram Plugs worked perfectly for over a year now. Since the beginning of the year, I have some “phantom switching” of some plugs, switching on and off.
Is there a way to see why this happens? In the app those “switches” are not visible and in Homey Insight my plugs are not visible.
Did you ever experience this as well?
Should I be worried regarding my account security?

Thank you