In fact, there is this possibility, but that political competition is always going on, and in this case it's going on in the constituency.
A couple of years ago, my constituency in Augsburg actually had five representatives in the Bundestag. We had five parties, five caucuses, in the Bundestag at that time, so in that particular constituency, we had a representative from every party in the Bundestag.
On the other hand, there were other constituencies in the country that only had one representative, namely that constituency winner, because the list people in that state happened not to live in that constituency. However, I cannot report any problems.