Folder on disk appears empty where it is not (OS X)

On OS X, when opening a folder, the list of files may not always refresh immediately. Only after selecting the same folder again, its contents become visible. This confusingly suggests a folder is empty where it is not.

This happens not on all installations of OS X. A pattern where and why it happens is yet unclear. We are looking for possible fixes.

Workaround: If you encounter a folder that looks empty, go back and forth to select the same folder again. This will make all files appear.

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