The Chasam Sofer in the Hagohos (O.Ch 59) brings down from The Tur* who enumerates all places where one should be careful when saying two words next to each other that he should pause in between the two words.
One of them is between ממליכים to את שם so it should not
sound like מת (the מ last letter of ממליכים with את)**
The Chasam Sofer adds that these two words are even more important to separate since there are sects
who worship the dead. This might be the reason why we stop in mid-sentence between וממליכים &
** Originally all Ashkenazim Davened Nusach
Ashkenaz where וממליכים ends with a מם