Multiplayer lagging in player but not in editor.

Ive tried solving this issue im having where im getting lag on a multiplayer server im starting when in in the standalone player, but when im in the editor doing the same, i get no problem what so ever.

Its like this freeze each second that is really annoying. Ive looked through and made sure its not a script(most of them atleast) and i havent found anything. The network settings are default with the sendrate at 15.

Does anyone what this is/have had it before or could help me on the right way of debugging?

Thanks //ArmedGuy