New MP4 Publisher fields not recognized outside of program

[ohrenkino]

see here:

MP4 Publisher compatibility

On version 3.11 support for the MP4 field PUBLISHER was added: [2021-10-29] REL: VERSION 3.11 (for Windows 11/10/8.1/8/7) [2021-10-20] NEW: added support for MP4 fields NARRATOR and PUBLISHER. That means that the Mp3tag name PUBLISHER is now saved to the MP4 frame "©pub" instead of "----:com.apple.iTunes:PUBLISHER" (as described in Tag Field Mappings – Mp3tag Documentation). This leads to an incompatibility with other software (e.g. foobar2000, MediaInfo), which expect the publisher to be…

Or perhaps better here:

Publisher tag not embedded properly

Hi. I'm editing tags for my audiobooks (.m4b) and everything works flawlessly except for the Publisher tag. I added a new column and choose field & value %publisher% for it (the %publisher% field is an already available extended field in Mp3tag). I added the values for my audiobooks and hit Save. When I right click on the file and hit Properties, as well as when I load my audiobooks into an audiobook player, the Publisher field is empty. I check the file with MediaInfo, the tag is registered…

as that discussion also picks up the problems of Publisher and Label.