Problem with custom tags since update to V2

[Mangar]

Hi Simon,

I use MinimServer since many years. Thank you providing such a good and stable product.

Since the update to V2 I have a problem with a custom tag GROUPING. The MinimServer is used by me and my father. I hear Metal and he hears Jazz. So I divided the music library by the GROUPING tag. It look like MinimServer is not reading this tag, but it's inside the MP3 files. I also changed the content directory to this folder to test it and I just scanned this folder several times with different settings, but it doesn't work. I also put a tag TEST in the file, it also wasn't read. But also Tags like LANGUAGE are not read.

Interesting: In the file given at WriteAllTags the LANGUAGE and TEST tags are written, but not the GROUPING tag.

I use MP3Tag for tagging and I uploaded a test file for you to my Nextcloud.

MP3 file

My settings:
alphaGroup = albums=300, items=200, folder=150, artist=100, all=250
contentDir = /share/Musik/_Test
displayName = Musik
excludePatttern = *RECYCLE.BIN,bak
indexTags = Grouping:Gruppe, Artist, Date, Genre, All Artists, Composer, Lyricist:Textdichter, Language:Sprache, Conductor:Dirigent, Orchestra:Orchester, ORIGINALARTIST:Cover-Version, Rating:Bewertung, Contentgroup:Inhaltsgruppe, Compilation=1:Kompilation, #AudioDuration:Dauer, Releasetype:Typ
itemTags = METAL ARCHIVES RATING
listViewAlbums = 1
.logFile = /share/Public/minimserver.log
.logLevel = info
serverOptions = language=DE
tagFormat = Artist.displayFormat={$artist$orchestra$conductor}
tagOptions = Date.yearOnly.index, Composer.reverseName.display, Conductor.reverseName.display, Artist.reverseName.display, Artist.ignore.sort={The,Der,Die,Das}
tagUpdate = /share/Musik/tagupdate.txt
writeAllTags = /share/Musik/allTags.txt
writeTagChanges = /share/Musik/tagChanges.txt

PS: I wrote excludePattern with 3 t's, because if not a "403 forbidden" error appears when posting this message.