Track numbers disappear

Why do track numbers disappear whenever I select more than 1 file from the List, to make global changes and saves in Tag Panel? I just noticed this and have removed many that I need to manually re-add.

I started with auto numbering albums, and then made changes files tags.

They don't disappear when I edit fields on the List, but then I have to copy, paste and, and enter to navigate from start to end to manually enter numbers.

I'm not sure if I changed something to make this happen. I couldn't find any related topic upon search in this community and hope someone can help prevent the track numbers from disappearing whenever I edit highlighted files from the field and make globals changes in the Tag Panel after Save.

Do you have APE tags in your files?

Which tags do you read, write and delete?

And in general - as you have posted now a fair number of questions, could you please follow the hints for support requests?

Thanks for your hints. I figured this out.

After selecting more than one file on the List to make global changes, I need to make sure the track number label is <keep>. They numbers won't disappear when I do this. Now I understand that when more than 1 file is selected, only shared text is displayed in the placeholders, not when the text differs. I never noticed this until a week after using this program. But now I do.

Thanks again for your hints that helped answer all of my questions that I researched in this community and discovered a few days ago after using an MP3Tag editor for the first time.

So the display changes to <keep> which would have been a much more exact description than to say the numbers disappear.
And as you don't know what I expect as the "exact" description and I don't know what you mean by "disappear" it is always the easiest way to avoid misunderstandings and doubts by supplying a screenshot that shows the problem.

Just a footnote: the same behaviour should be observable for TITLE as well - or the lyrics.
Why the covers disappear

cannot be answered by selecting multiple tracks unless the all have different embedded pictures - but then it should be noted next to the picture frame that this is the case.