I tried to export few items using dsc export and they all seem to have their Notes field truncated to exactly 181 characters:
# random document with longer notes field:
❯ cat metadata.json | jq .notes -r | wc -c
181
The JSON itself looks complete and valid, it's just the field is not complete. The same item shows correctly via web interface including full notes text. Items that have shorter notes show up complete in the export, only longer notes are truncated.
I have tried latest version of DSC from master branch and 0.11.0 - both seem to do the same. I'm running Docspell version 0.42 and currently can't upgrade to 0.43, so sadly can't test with that.