We see good performance from Leverkusen during this season but that's not a good reason to say Bayern Munich is not going to win the Bundesliga title anymore, Bayern Munich is a team with experienced and expensive players like Harry Kane in their team, and that usually has many better chance than all other teams in the Bundesliga. I even think Leverkusen will lose their place soon in the table to Bayern Munich.
This season's Bayern Munich will still be strong favorites to win the Bundesliga title this season, especially as the Bayern Munich squad can be said to be better than last season because of the presence of Herry Kane. Harry Kane's arrival at Bayern Munich was also the main reason for being able to win a trophy because at his previous club he had never won a trophy, of course he will work hard to make this happen to perfect his career in the world of football.
However, seeing Leverkusen getting stronger will be an obstacle for Bayern Munich to get the Bundesliga trophy this season. Leverkusen has looked terrible this season, all lines are strong and play hard and full of skill, have the ability to play 90 minutes continuously attacking and running to destroy the opponent's defense even though they have a margin of more than 3 goals. If they can persist with this kind of play until the end of the competition they will win the title but if they are like Dortmun last season where at the end of the league they became inconsistent they will lose their chance to win the Bundesliga title.