Group not placed on the "OFF" switch log

[mattley30]

Hello everyone
a strange thing happens to me, I created a group that turns on and off some of the lights switches it works normally but in the log of each switch it is reported (date is time and on) for switching on, but for switching off it is reported (date is time " empty field).
This does not affect web domoticz, but on the Domoticz App the lights that should be turned off remain on.
I would say that the devices used for the lights are shellys managed by the enesbcs Shelly_MQTT plugin, which, however, by acting directly on a single device on domoticz in the log is written on and off regularly.
Other dummy devices do not have this problem.
Do you have an idea how you can solve it?

The version of domoticz I am using is Beta 4.11333 on raspberry Pi,