@Fotodrops - We added your contact information on the development team ticket for this. It will occur on some TIFF files. You can use the original out of camera files and it will not have this issue and also give better results then using the app on edited TIFF files. You can also revert to v4.0.1 if TIFF files are the only files you have access to. This v4.0.1 version, which you own, will not have the display thumbnails issue.
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