I just upgraded to Calligra 3.0.0.1 in Antergos/Arch.
When I open a .odt file that was created in LibreOffice with Callibre it does not show (all) the borders of the tables. If I then save the file again in Callibre and open in LO all table borders are gone. Would there be a way to get both apps to properly render the same .odt files?
To give you an idea about how it looks I have included a link to a composition picture of the three stages: LO - Callibre - LO.

https://drive.google.com/open?id=0B1E-kzA1HrhvTVJKT3FYNzBVNHM

Yeah, seems something fishy is going on.
It's on the todo list.