Thanks for reaching out, @Christian_Fingerhut!
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Has this happened more than once? How often does it happen? Is it always the same albums each time?
Can you share a screenshot of Settings > Storage?
Thanks!
Dylan