Libreoffice 18.104.22.168 20(Build:2) hangs on 19.04 with "Loading document.." on some but not all ODTs. I had no issues on 18.10. Note that I had removed the hidden lock files in the directory.
It was no linux file permission issue:
ls -l *odt -rw-r--r-- 1 me me 160558 Aug 13 2018 fails.odt -rw-r--r-- 1 me me 16466 Apr 22 22:32 works.odt
After removing /home/christian/.config/libreoffice the problem goes away. Why was the file locked? Did something go wrong in the installation?
For the record: My fresh 19.04/Libreoffice gave me several warnings and errors, "failed to read path from javaldx", and locked up. I purged the Libreoffice installation and removed the config directory, and even installed java* as advised by the command-line messages.... very messy.