Rest in one voice only

First of all this plug-in is the best idea for any choir singer for rehearsal as a lot of time two voices are written in one line. Very much appreciated!
While trying some of my sheet music I found that in many instances the rest is only written in one voice, causing both voices to lose the orginal timing because the rest is missing in the second voice. The only soluttion I wound so far is adding the rest manually. It's probably hard to automate, as in many other cases this might be correct.