I'm playing "Seven Years War".
I had around 10T when I sold Iron for 5T I got nothing!
also in money cache I got message: "... +7T ..." but relly got 1—2T
It was few times.
Just tested was around 12T sold Iron for 1T and resut 7T
what the hell?

You have auto-purchase something enabled

o thanks, forgot about it
I must eat some drugs for memory

I've done that so many times. accidentally left auto-purchase something or other enabled, and all the sweet that was supposed to go into mercs to finish a level ...

... go into silly mine upgrades or army camp upgrades, etc

and in 1 feel swoop, your progress is wrecked