We have an utility to process images, built as a standard droplet (using the code floating around with distinction between folders and individual files).
On one installation (MacBook Pro, macOS 11.5), dragging on a single folder works fine, but when dragging on a selection of 4 files, only 2 get processed. An alert at the beginning of the code confirms that only two files are “taken”. Various tests by exclusion show that we have a set of 2 specific files which make the other 2 not being processed. If in the group we drag onto the droplet, one of those files is included, only that one gets taken.
On other installations (iMac, macOS 11.5 or virtual macOS 10.14), this effect does not show up with the same files.
Has anyone heard of such an effect? What can be the cause? What can be done to avoid it?
Any hint is highly appreciated.
Thanks a lot in advance.