Reason is clear and obvious, we don't play the high press as intensive and aggressive as last season.
Part of that reason is the absence of Kane.
In addition Alli and Eriksen, in general, have not been playing as well as they had last season.
We should also not forget that the absence of Toby may have contributed to the goal today.
With him around, it gives the other defenders more confidence and better organisation.
We also miss his long cross field accurate passes to start new attacks.