Large scale melee {such as inside a fort with 10 or more Darthmod sized units engaged} lags the game to the point where every seconds' worth of action takes around 10 seconds {in one seige assault it was over 15 and even at 4x speed it was still between 11 and 12} to happen {I measured it from the countdown timer when I took control of the fort centre ... the lag had eased up a little by then !} .
At first I thought it was a pathfinding issue in forts , but observations of some field battles {where lots of simultanious melee happened} and carefull observation of the seige battles shows it is without doubt lots of melee that does it {and it goes from a little lag to more than you can point a stick at almost instantly at some threshold which seems to be something around 8 to 10 units on Ultra with DarthMod sized units} .
This doesn't happen during massed volleys {every unit with a gun firing} despite
It is anoying . One battle {both armies full stack} took 4 hours to finish {I tried killing as many with artillery before moving in too knowing by then what to expect} !










On the previously mentioned bridge bug :
As a workaround , I found using the move forward/backward buttons in the GUI still worked and was able to get the unit I had stuck there off the bridge .
Cumbersome , I agree , but better than nothing until it is {or at least bloody well should be} fixed .







On the land-bridge arrows disappearing :
I have had this happen too {Leeward Islands and Antillies both} , however only {so far} when playing as India . Might it only happen when you don't start with territory in that area ? {still needs fixing , but a few clues might speed that up}