Shelly 1PM continuosly (virtually) turning on and off

I have 3 pcs Shelly 1 PM devices installed yesterday and with integration in Home Assistant. In HA log file it shows that they are all the time turning on and off. This does not really happend, the devices all stay continuously on, but HA log show that they are switching between on/off. Any solutions for this?. It's not so nice that it fills up the log.

Shelly.jpg

I updated one of them to the latest firmware with no help.

Update of (HA) Shelly Integration removed the problem.