Help - modified tags not read by players

Hello,

I use 3.7.0 (repo version) on updated MX Linux 19.2.

I can edit tags on hundreds of music tracks (mainly .mp3) thanks to kid3. I changed some "genre" tag to better use in my music player : deadbeef, and mpd through moOde (raspberry pi distro). I change ID3v2.3 tag. After tag editing in kid3 I click on "save" before quitting.

However neither deadbeef nor mpd (nor vlc) seem to see any change, they display and use the same "genre" tags as before.

So I didn't reach my goal yet. Could you give me clues what I should try about ?