How to reproduce:
- buy a large number of reinforcements that the list you can open in the message log is more than one page long
- get free reinforcements
- open the list of bought reinforcement in the message log and scroll down
- close that list of bought reinforcements
- open the list of free reinforcements
- try to scroll up
- the game crashes
First you get this pop-up 3 times
The third time you click it away you get this pop-up
If you click 'No' or 'Cancel' you just get the first pup-up three times again and start all over until you click 'Yes'. Then you CTD.
This has happened to me a number of times, but I never really realized what caused it until now. I've been playing about a year now and started with patch level 1.14 at the most (and last had it in 1.16b4), if not earlier, and have not noticed a change in the behavior. But this has only happened very rarely. Probably because the conditions occur so seldom.