There is a bug that sometimes causes importing bookmarks with verse notes to fail and the application to freeze.  It is not known if this bug crept in at version 1.2.1 or 1.2.2.

The bug has been patched in update 1.2.3 and I’m attempting to upload it to Apple right now.

In addition, I made some speed improvements so importing a large number of bookmarks should go much faster.