This bug is for filesave to RTF of table in footnote.
Open attachment 120526 [details] or attachment 152130 [details] and save as RTF.
Opening that RTF, table is not correct in LO and there's an error in MSO.
Fileopen was improved in 7.2.0 with commit that solved open and save of DOCX by converting tables to floating tables (with frame) during import and export.
General enhancement is bug 76007.
I confirm it with
Version: 188.8.131.52.alpha0+ (x64) / LibreOffice Community
Build ID: 15a9bee9ef26ce13ed1e26319306a88b6d886158
CPU threads: 4; OS: Windows 10.0 Build 19042; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: en-GB