I am experiencing very slow behaviour in the latest version of Lightroom. From Google, it seems this can be quite common now.

The particular problem I have is after Developing a file and returning to the Libray to add the file to a collection, I encounter the view shown in the attachment, where Loading message on the Loupe view just keeps going and interferes with further actions.

Can anyone offer advice here please?

SLow Load capture 270515 by Ian Brewster, on Flickr