That isn't a great user experience, we're sorry to hear about this. Please explain the issue you're facing in more detail with a brief description of your workflow.
Are you getting any error message and if yes, when exactly are you getting it?
Which version of Lightroom are you using and on which device(mobile or desktop)? We are here to help, just need some info.
Just a reminder, the Adobe Forums are transitioning to a new community experience soon. New threads and replies posts to the forums between August 22nd and September 9th will likely be lost, but we’re here to help.