Hi Marie,
I just tried to create a small test case, but here it is working OK. So I need to check under which conditions this happens. I recognized this today when I had edited the same image with PL4 and PL5 and the capture time was 2h apart.
E.g. this also happened to the files where I compared the PL4 vs. PL5 DeepPrime export times:
With PL4 OK:
C:\Users\Sebastian\Desktop\0\PL4>exiftool.exe -G1:3:7 -S * |findstr -i "filename OffsetTimeOriginal"
[System:Main:ID-FileName] FileName: PA039627_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039628_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039633_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039637_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039639_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039641_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039649_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039650_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039653_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039658_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039659_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039661_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039664_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039670_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039671_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039681_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039686_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039688_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039690_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
[System:Main:ID-FileName] FileName: PA039693_DXO_PL4.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +02:00
With PL5:
C:\Users\Sebastian\Desktop\0\PL5>exiftool.exe -G1:3:7 -S * |findstr -i "filename OffsetTimeOriginal"
[System:Main:ID-FileName] FileName: PA039627_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039628_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039633_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039637_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039639_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039641_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039649_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039650_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039653_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039658_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039659_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039661_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039664_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039670_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039671_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039681_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039686_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039688_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039690_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00
[System:Main:ID-FileName] FileName: PA039693_DXO_PL5.jpg
[ExifIFD:Main:ID-36881] OffsetTimeOriginal: +00:00