specialDisk/folder/any in fileTypes

Xojo2019r1.1. and r2: after adding specialDisk and specialFolder in FileType/FileTypeGroup, I had to add fold and disk in the Mime field otherwise f.type would return random types.

As for SpecialAny: adding it selecting the 6th item in the dropdown menu of FileTypeGroup, in the extension field I get an asterisk (*), adding it after selecting More…, the extension field remains void.
Now, without the asterisk, above the filetype icon there shows up an exclamatory (!) in a red hexagon; adding the asterisk to extension field, the red hexagon disappears.
This holds true also for specialDisk and specialFolder.
Should one add the asterisk or not?