MP3 unable to replace album covers (ID3v2 Tag)

First of all, hello everyone, the title limiting me to a certain number of characters, I specify it longer:

" MP3 files cannot replace/delete album images/covers (ID3v2 Tag) " .

So here is my problem, when I listen to music on my smartphone, sometimes album covers appear in the background. The problem is that they have nothing to do with the music in question...

I did some research and learned about the existence of ID3v2 tags, which allow you to give a title, artist name, album cover, etc. to a song.

I used the Mp3tag software to manage all the ID3v2 tags. The problem is that no matter how much I try, nothing works; the album covers mentioned above do not go away...

Before posting, I did several tests, so I will try to be as clear as possible:

- By adding the ID3v2 tags (Title, Artist Name, Album Cover) everything displays correctly when I play the audio file with VLC on my PC.
- On my smartphone (which is a XIAOMI MI-3 for info) only the "Title" and "Artist Name" tags are used properly (knowing that I only use the "Title", "Artist Name", and "Album Cover" tags).
- When I try to replace the unwanted album cover with a cover related to the music, my smartphone still displays the unwanted cover.
- I tried to put an album cover on a file that did not display an unwanted cover, but again, nothing works; my smartphone displays nothing.
- I do not have (unless they are hidden) the unwanted album covers on my smartphone.
- I also tried to delete all the ID3v2 tags from my audio files with Mp3tag, but again, nothing works; still this cover problem...

So I am starting to run out of ideas, and that is why I am posting here.

Is it due to the ID3v2 tags? To my smartphone? To the images I use as covers (dimensions, extensions...)? Or to something I am still unaware of?

If someone could shed some light on the subject, it would help me a lot ^^ ...

Thank you in advance for your answers ;D .