Discogs source saves TITLE tag as lowercase "Title"

[ohrenkino]

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Why some of my custom tags stored in UPPERCASE and others in lowercase?

Greetings to community!!! I have make some custom tags for my mp3 files and when I check them, for example using MediaInfo or Audacity, I notice that some of them are in UPPERCASE and others in lowercase!!! Any idea why is this happening? Should I do something when I am creating them? Thank you in advance!!!