DNG converter changes EXIF field OffsetTime

I use a Canon 5D Mk IV, with the time zone set to London (offset = 00:00) and daylight saving disabled, so that all images remain on UTC.
If I look at the EXIF data, the CR2 file has the value 00:00 in the OffsetTime field.

When I use DNG converter, then the resulting DNG file has the OffsetTime field modified to be 01:00, which is not the original value stored in the raw image file.
This value then propagates through the rest of the workflow in Lightroom, with the result that the exported JPG files have the incorrect OffsetTime value.
This causes applications such as Apple Photos to display images in an incorrect order if sorted by time and date.

Despite Adobe's statement that DNG converter does not modify EXIF data, the evidence is that DNG Converter does change the OffsetTime field. I believe this to be a bug.

Here's the evidence - look at the OffsetTime field, which is 00:00 in the original and has been modified to 01:00 in the DNG file (and subsequent exported JPG file).

Time/date information in original CR2 raw file (Canon 5D Mk IV):

ExifVersion 0231
DateTimeOriginal 2026:06:14 15:22:33
CreateDate 2026:06:14 15:22:33
OffsetTime +00:00
OffsetTimeOriginal +00:00
OffsetTimeDigitized +00:00

DNG file using DNG Converter 18.4.1 (with embedded CR2 file):

ExifVersion 0231
DateTimeOriginal 2026:06:14 15:22:33
CreateDate 2026:06:14 15:22:33
OffsetTime +01:00
OffsetTimeOriginal +00:00
OffsetTimeDigitized +00:00

JPG file exported from Lightroom:

Same as DNG file