try 3

FHEM/74_GardenaSmartDevice.pm

@@ -308,9 +308,8 @@ sub Set {
   $setList =~ s/\n/ /g;
 
   if(AttrVal($name,"useSetExtensions",undef)) {
-    my $a0 = $aArg[0]; $a0 =~ s/([.?*])/\\$1/g;
+    my $a0 = $name; $a0 =~ s/([.?*])/\\$1/g;
     if($setList !~ m/\b$a0\b/) {
-      unshift @aArg, $name;
       return SetExtensions($hash, $setList, @aArga) 
     }
     SetExtensionsCancel($hash);