digiKam 5.9.0 on Windows 10. I am mainly storing Canon .CR2 files from 60D and 80D cameras. Sometimes (maybe 1 time in 10 or less?) when I double click a thumbnail in the "thumbnails" view to open it in the "preview" view, digiKam just closes. No error messages or anything nor can I find anything in system event log, so it is apparently not crashing, it is just as if I had clicked the "X" button on the main Window.