Created attachment 181733 [details]
An ODT without style information
Attachment (actually, a completely stripped out ODT without any style information, from commit 3a7a06067e545670ef64367ef602469f507a3df7) does not include font information. When opened in Writer, it uses the hardcoded default Liberation Serif for default style, not the font defined in Options->Writer->Basic Fonts.
1. Open the attachment, and check its language (in status bar) and fonts. Close it without save.
2. Change application's default language and fonts (language: Options->Language Settings->Languages, Default Languages for Documents->Western; fonts: Options->Writer->Basic Fonts).
3. Open the attachment again, see that the language followed the changed defaults, but fonts didn't.
Arguably should be WONTFIX - will not have much of impact after implementing bug 139962.
Version: 184.108.40.206.alpha0+ / LibreOffice Community
Build ID: a9d225df2f8772e21435523ca20df1ece37390e4
CPU threads: 4; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: pt-BR (en_NG); UI: en-US
An advantage of using hardcoded defaults in the absence of an information in the document is having "partial" documents more predictable, less dependent on custom settings (in case when the hardcoded defaults never change across program versions). Another reason to WONTFIX (possibly the most important), or even NOTABUG (works as intended), which I will assume here.