Hello,
I have five bugs to report (two of which I suspect are variations of each other).
Let me preface by saying that our group of friends use no other mod than the CBP, taken from the multiplayer modpack made by Lynnes. 1-23 stable release with EUI.
We of course have every official DLC for Civ5.
First one :
-Sometimes, some units produced by the Iroquois don't start with the Woodsman promotion as they should. It happened on two separate games in multiplayer.
We only noticed it on Mohawk Warriors (probably because it's the only unit we build
in large numbers with the Iroquois

).
Second one :
-Sometimes, some siege units produced by the Swedes don't start with the additional
movement promotion. I noticed in my last Sweden game that one of my catapults had only 2 movement.
I suspect these bugs come from the same source as they are very similar.
Of course, I know this description is very vague, hence I tried to reproduce the bug.
I launched multiple solo Sweden/Iroquois games and spammed producing/buying units, but I did not manage to reproduce it so far... maybe it only happens in MP, although I don't see why it would behave like that.
My impression is that it can occur when units are bought instead of produced (since that is how it happened in our games).
I'm sorry not to be able to be more precise.
Third bug :
-Sometimes, when picking the Sovereignty policy from the Tradition tree, the building associated to it DOESNT APPEAR in the capital

It happened in two separate games so far, to the same friend, who noticed he wasn't gaining +2 faith when picking Sovereignty, then looked in his city and... no court Chapel.
It is a very rare bug (we played more than 50 games so far, and there is always at least 2-3 of us choosing Tradition

).
I have no idea what could trigger this, or how to reproduce it consistently...
Again sorry for not being more descriptive.
Fourth bug (critical, multiplayer only,happens to me only so far) :
- Talking to the IA, that is, clicking on its cities, or looking at its offers, or clicking on its bubble portrait on the right hand side (EUI) will often crash the game.
It ALWAYS crashes if I click on the portrait or a trade offer.
It has a lower chance of crashing (20% ?) if I click on a city.
There are never any problems in solo.
It happens only in MP, and only to me out of my 5 friends. I may add that I'm always the host of our games and it may be correlated (even though I highly doubt it).
I have already reinstalled cleanly CIV and the CBP to no avail.
The crashes come without error messages at all. Straight up to Windows desktop.
Fifth bug (I know it has already been reported multiple times) :
-Leaving barbarians on in MP will cause the game to reload almost every turn, making it almost unplayable. As such, we always play without barbarians, which is a shame.
Thanks for reading that wall of text, and thanks in advance for your help,
If you want me to try to give you additional information (logs, etc), feel free but you'll have to explain how to do that to me

.
Beyondnooblike