It is still very early to judge the level of consistency of any team in the Bundesliga, because changes in position in the top standings are still very possible, especially since the points distance is still quite close so that a defeat for any team will cause more changes in position in the seventh week in the Bundesliga this time. I also hope Dortmund can win with a big score when hosting St. Pauli this weekend so that the competition for points and positions can be more interesting in the Bundesliga after this week.
Any team is likely to lose in the next match so whoever consistently maintains victory will have the opportunity to achieve much better results to be at the top of the standings. When Dortmund is outside the title race or in the top three of the standings, the Bundesliga does not become more interesting because there will be little competition for Bayern Munich.
The points are still quite close to each other so there are still many possibilities that will happen because the competition is still long and there will be problems that will be faced by any team, especially when some of their players are injured.
This season has just entered week 6 so I think it's too early for us to measure the strength of a team or see its consistency.
Dortmund is still a strong team and I'm still quite sure they will be able to stay in the top 4 and regarding what happened in the Bundesliga this season we can see what happened last season and it is also possible that it will happen again this season.
Bayern lost its title last season and this season they are doing more to be able to get back its title while several other teams are also like that especially Leverkusen who are ambitious to defend their title, so I think the competition in the Bundesliga this season will remain fierce and even possibly fiercer than last season.