Welcome to the Roku Community, @Papanick!
Thank you for reporting this issue. Our appropriate Roku team is currently investigating.
In the meantime, one workaround is to upload your photos to Google Photos and connect them to your Roku account in the Backdrops app.
Visit our support article for more information on how to use backdrops on your Roku streaming devices.
All the best,
Chel
Jecheal R.
Roku Community Moderator