Sorry at this time if Chelsea's performance looks unstable, it is clear that Dortmund has plus points because they have played consistently. And if Chelsea still can't determine which direction in terms of management, whether players or coaches are not fully supported, then Dortmund will easily make Chelsea falter later after this break is over.
Therefore, Chelsea still has time to fix all the internal and external gaps that occur. Chelsea is currently in a fairly indecisive condition.
Graham Potter did great at the start of his managerian role in Chelsea but things have gone sour since then. Both the fans and The Chelsea hierarchy are losing patience. The Chelsea team has an advantage to return early to league match than Dortmund. Although it's disadvantage because of lack of rest which might cause fatigue at the long run.
Dortmund also aren't doing quite well. They are losing some kinda of matches they aren't supposed to lose. They are currently languishing at 6 position on the bundesliga table. With teams like union Berlin, Freiburg ahead of them.