Background black color on some catalog coins [solved]

I recently shared the pics of the following coins, among the others: 5 Scudi 1979 and 5 scudi 1992 from San Marino.
I see the published pics show an unconvenient background black color even if my pictures do not have that. Can any admin fix that to look like the other coins in the catalog?

That is really strange that it’s normal when you open up the page. It must be some glitch

Matt

Here are the links.

https://en.numista.com/catalogue/pieces95104.html

https://en.numista.com/catalogue/pieces95113.html

and my pictures.

[removed the pics as they were fixed on the catalogue]

I don't know what's wrong with the catalogue showing that black color.

You need to upload them in JPG, not PNG. Black colour - seems to be transparent on your pictures

these pics I posted are the same as the ones in the catalogue. They are in Jpeg format here and there too. I can't understand why they work properly here and not there… being the same internet web site.

"here and there too" WHERE?
here on this post they are in .PNG the background is transparent, not white.

TAKE and DONE

Since when can we upload png pictures in the catalog, not that I would want to because they are so wastefull size wise?
Is it since Numista v19.13.5?

In the catalog they are in JPG
but there is no background color : transparent it is not white
"black is black, there is no hope" (J.Halliday)

revised

Thanks for fixing those pics.