TKB Home pocketsocket | Not working correctly anymore

I use a few TKB Home sockets with ST. They all worked perfectly for about a year, untill beginning of this week 1 pocketsocket suddenly starting acting strange.
I can still control the socket with ST, it still measures power. And when i turn it off/on the light indicator also shows the right state. But when it gets switched off the power just stays on.

Before i throw away this device because its faulty i wanted to check here if any of you have experience with this? I havent tried a factory reset yet, i will still try that.