Now that I've (partially) solved the problem with SVG import (due to special characters in the path), now there is a new issue:
the titles I used in the past has many new line characters (the text is written in many lines) but now kdenlive ignore it.
All the text is shown in one single line and misplaced.
You can try to view this svg in firefox and then add it in an empty project: you'll see only one line with all the text concatenated.
Sample file for multiline text: