31_HUEDevice.pm log warning

[bmw-biker]

Hi
HUEDevice works great - also for some Chinese products.
Many thanks for that !

One issue I've got...
I mainly use some of these Chinese sensors, like Konke and Aqara.
Once setup they work very well.

Although sometimes I get a warning in Fhem log file from last line of function HUEDevice_Get.
PERL WARNING: Use of uninitialized value $list in concatenation (.) or string at ./FHEM/31_HUEDevice.pm line 1257.
It seems that I get these warnings during setup, each time I change an attribute from Fhem UI.
I put a log code at the beginning of regarding function HUEDevice_Get.
my $cmd= $a[1];
Log3 $name, 2, "[$name] command <$cmd>";
The output shows that if in case of a warning a Fhem command '?' to this device is being issued.
[motion_FX_stairs] command <?>
Yes, the command itself seems to be a questionmark and therefore is not being handled in the code.
Because of my sensor the $list at the end of HUEDevice_Get will not be set.
So the last line of HUEDevice_Get throws the warning.
return "Unknown argument $cmd, choose one of $list";

Could you please implement some bugfix ?
Where does command '?' come from. I do not issue it. I only set valid attributes in Fhem UI.
Maybe e.g. just ignore the '?'

Best regards