SharePoint Online Picture Library Rotation

Hi all,

I've got a problem at one of my client.

My client is using a picture library to share photos from events.

But, after uploading some (not all) of the photos, SharePoint rotates the thumbnail and preview picture. 

So:

1. The photo including the thumbnail on the local computer is OK
2. After uploaden the photo to SharePoint online the thumbnail is rotated, the preview picture behind the thumbnail is also rotated, but the real picture behind the preview is OK

Does anyone know how to fix this problem?

Hope to hear from you soon!