Tile and/or thumbnail view in picture library (in SharePoint Online)

Hi,

Scenario: I set up a picture library weeks ago with new experience look, and the tile view (someone call it thumbnail?) of the pictures have worked fine. Suddenly today they doesnt work anymore but did yesterday. Every picture shows like a standard icon. Ive googled it and see that it only work with the old experience of sharepoint, and that is no good! In 2020 preview should really work new or old look....

So why did it work until today? The only difference is more picture in the library, and one folder. (I tried other picture library whit only one picture with same result)

And is there any workaround? Some say JSON, but thats not for me....

If I cant find any solution to this the picture library is really bad and not for us..

Appriciate any answer!