This is a reoccurring problem in LibreOffice Writer (Version 220.127.116.11. on Ubuntu 2204 LTS). In documents that use Asian text, when the text direction is horizontal, everything appears as expected.
However, after setting “Page Style”/“Text direction” to vertical. The Asian text disappears (Western text remains).
I have included the file for reference.
noms-pour-calligraphie.odt (10.6 KB)
Does anyone have any ideas?