I am playing Italy in the 1850 GC under version 1.03d and have reached 1867.
I am facing a serious issue / bug / undiscovered game feature where my stockpile of luxury goods (my main generator of private capital) and to some extent my wine stockpile (also a good private capital generator) seem to halve every other turn for no readily discernable reason. There is no civil unrest so I am not losing these items due to looting (contentment is on average 94%; lowest province contentment is 67%; all provinces are content or happy). I am not losing them due to over stockpiling. I have mainly kept my stockpiles relatively small around 30 - 40. For luxury goods I am producing 36 a turn. I am selling at 80% to my internal market with no external sales.
Strangely in the same turns I am losing luxury goods and wine I am getting increases in my wood and mineral stocks (not sure if this is related or not).
The problem seems to have coincided with starting to sell to my colonial market (can't remember if this is the exact time I first noticed it)
To be honest it is very frustrating as it is having a serious impact on how much private capital I am raising per turn and therefore my ability to improve my economy and perform colonial actions.
Can anyone help as this is slowly killing my game? The one thing I have not tried is turning off all sales and boosting stockpiles to say over 100 in case my stockpile level is too low for some reason.