I don't think this will be a hindrance for them at the moment.
There is no reason for Leipzig to hold back now, especially since they are still quite close to Freiburg now.
it will be better if they continue to make breakthroughs and secure the top 4 position there and the way is indeed they have to win in the remaining matches at this time.
with their current performance which is still unstable I actually still believe they will do this and will still be in the top 4
Now on 14th May we have last round of Bundesliga matches in this season and here Leipzig is having some good advantage on Freiburg they are going to face Arminia Bielefeld which is the worst team in this season and having no win in last ten matches is not going to create any problem for Leipzig for qualifying into Champions League for next season even just draw is also enough for them to go through on other side Freiburg is going to face Bayer Leverkusen in away match with pressure on just win is must for them with Leipzig to lost so here most chances they are going to stay in for Europa Cup hopefully we will have some better performance from them in Bundesliga, and they will try to reach into last four with their good performance.
All eye people now in Leipzig and Freiburg, both still have a chance to Champion league zone, Freiburg hopes Leipzig lost versus Bielefeld and they get a win versus Leverkusen. But I think it's hard to get a win on Leverkusen's home because Freiburg was lost versus UB at the home, this means they are an unstable club, they still have homework to fix it asap. They also have the final DFB which makes splits the concentration. Only miracle to bring Freiburg got the DFB title and Champion league zone.