Yeelight Crystal Pendant Light becomes unavailable after random amount of time but reconnects after switching off power

Yeelight Crystal Pendant Light becomes unavailable after random amount of time.
If I switch power off and on, they became responsive just in a few seconds.
All three became unavailable at the same time.

Firmware is the latest available in the yeelight app.

I’ve tried:

  • factory reset all 3 crystal lights
  • change router
  • change router setting to split 5 and 2.4 wifi networks

What else can help? Because it happens 5-6 times a day.
If I can provide more information that can help, just say it.

P.s. All other yeelight device work correctly. Crystal lights started to have an issue a week or two ago.

Привет. Решил вопрос? У меня подобное