Created attachment 161797 [details]
Document compared as ODT, DOC in LO, DOC in MSO
This is DOC bug for export and import of Writer input fields, that were resolved in bug 128460 and bug 125103 for DOCX.
Open simple ODT attachment 151155 [details] and save as DOC.
Open both in LO (looks good but is wrong, cannot be edited) and MSO (no field).
This about two different problems, so two bugs IMHO.
1. The field is visible in Office 2003 (not sure if it behaves as expected)
2. Field can't be edited after export and re-import (seen in LibO 7.1 6.0 18.104.22.168 4.2)
3. Not sure how to create such field from scratch (tried to replicate, but had quite some issues with field editor. And if I got something.. it got blank on export to DOC (and reopen in LibreOffice).
4. Not even sure if there is a limited list of allowed field types for DOC. It looks pretty predefined in Word 2003 (based on my superficial observations). However surely not known to much about fields
Repro with file.
Arch Linux 64-bit
Build ID: 869ef9f2118158222032964a5b24ae7d760b84e9
CPU threads: 8; OS: Linux 5.7; UI render: default; VCL: kf5
Locale: fi-FI (fi_FI.UTF-8); UI: en-US
Built on 31 July 2020