winscp session logging on level auto disable

Hi,
I'm using WinSCP v5.21.2 in Azure VM Windows Server 2019. I have enabled session logging on level but everyday when I check back the setting it is auto-disabled. Is there any settings I missed out or this is a bug?
Thank you

Logging might turn off, when it fails. Does it?
Do other WinSCP settings preserve? When does the logging settings reset? Is it each time you close WinSCP? Or when you open/close a session? Or less often?

Hi Martin, this will happened everyday morning when we check the VM status and the WinSCP logging. It will be in uncheck/disable condition. The exact time is unsure since they are no log for us to check the situation.

Sorry, but that is too vague. We do not know what is happening in between. We do not know what are you actually doing with WinSCP. It's still not clear, if the logging would be turned off even had you checked another time, not only in the morning.