DebugLogLevel 'Reduced' not applying

I've got a PowerShell module which uses WinSCP (5.17.9). When I apply the DebugLogLevel to the session the value -1 which is supposed to represent 'Reduced' doesn't apply. The log level remains as 'Normal'. I can see in the session output within PowerShell that the value is assigned as -1, but it's as if it's being ignored. It works fine for Debug 1 and 2.

If I manually assign a value that clearly isn't available e.g. -2 then I get the following error:

Exception setting "DebugLogLevel": "Specified argument was out of the range of valid values.
Parameter name: Logging level has to be in range 0-2"

I can still assign the value as -1 without any issue. So I guess the error message just hasn't been updated. The GUI works fine.
Anyone else had any issues with log level for 'Reduced'?

Thanks for your report.

This bug has been added to the tracker:
https://winscp.net/tracker/1936

Can you send me an email, so I can send you back a development version of WinSCP for testing? Please include a link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.

As requested, I've just sent you an email.