I think winning the Chmpanios League is much more important for any team than the Bundesliga but still for a team like Leverkusen when they are having a record in the Bundesliga, that's normal to see them putting much more effort into the Bundesliga matches. On the other hand, we have Bayern Munich, they are also playing in these two tournaments but it seems Bayern Munich is trying harder for the Chmpanios League than Leverkusen.
Bayern Munich are more focused on the Champions League because that is most important to them now and they feel that the Bundesliga is not something they should worry about since they always win it every year. Leverkusen will be more focused on the Bundesliga title because that is what is more important to them. I think it is a game of priority now and each team will go for the most preferred competition for them at this point.
Bayern Munich in domestic competition is too powerful so last season they always focused on the champion league. but this season in domestic competition the competition with leverkusen is very tough.
But this season Bayern Munich is the strongest candidate to win next to Manchester City and Real Madrid.
Big teams usually want to take trophies in competitions that are qualified in the domestic league and champion league. so Bayern Munich will not leave one of them to focus on the champion league competition. so all will remain the focus to win all prestigious titles.