Rebuild embedded EXIF Thumbnail - not working

[m-london]

Scenario
When converting a JPG and over-writing the processed image over the original, the thumbnail does not update to reflect the updated image

To re-create
1. Use XnConvert (v1.95 or v1.96) to convert a JPG
2. Add a noticeable action (e.g. crop the image in half)
3. Set the following output options...
     •  Folder = Source folder
     •  Filename = {Filename}
     •  If output file exists = Replace
     •  Format = JPG
     •  JPG Settings = "Rebuild embedded EXIF Thumbnail" -- checked

Expected result
Image is cropped in half, image thumbnail is updated to show this

Actual result
Image is cropped in half (opening image confirms it has changed), however thumbnail shows original (un-cropped) image



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Tech info
     •  XnConvert version: v1.95 + v1.96
     •  O/S: Windows 10 64-bit

[xnview]

i can't reproduce, the output file has good embedded thumbnail. Could you send me a sample file?