In section "Input-output text formatting" for -j it says:
...(ie. export with -D, -H, -l, or -T is not compat a i ble, and use -G instead of -g).
Found in the current download versions and here https://exiftool.org/exiftool_pod.html
praise exiftool, including the people that belong to it :)
Great, thanks! This will be fixed in the next release.
- Phil