Comment 2 for bug 1729887

This just started happening to me on 17.10. The behavior changes with the circumstances. I've done several tests and see the following reproducible behavior:

scenario 1 (moves as expected)
-drag and drop file from Desktop to Desktop/tmp (no nautilus window open) - File is moved as expected

scenario 2 (bug: copy instead of move):
-open nautilus to Desktop/tmp
-drag and drop file1 from Desktop to Desktop/tmp(nautilus) - Bug: file is copied not moved

scenario 3 (moves as expected when first moved in nautilus, however, only does it once):
-open nautilus to Desktop/tmp
-drag and drop file1 from Desktop(nautilus) to Desktop/tmp(nautilus) - file is moved as expected
-drag and drop file1 from Desktop/tmp(nautilus) to Desktop(nautilus) - file is moved as expected
-drag and drop file1 from Desktop to Desktop/tmp(nautilus) - file is moved as expected
-drag and drop file1 from Desktop/tmp(nautilus) to Desktop - file is moved as expected
-drag and drop file1 from Desktop to Desktop/tmp(nautilus) - Bug: file is copied

I tested this with several different files and types (text, pdf, ods, etc) to ensure it was not related to type or specific file, the behavior was the same for all. Closing nautilus window or moving another file before moving file1 causes the file to be copied instead of moved.

Sorry for the long comment but I hoped this might help the devs isolate the issue.