I have had multiple occasions in my ongoing PBEM when units failed to merge with the stationary unit in the destination region.
What could be the reason, stacks are not "right click anti-merge" locked.
It could be a major issue, if one is trying to merge with an entrenched unit defending a region. This has never happened to me when I was the host, or when playing against the AI.
In it, I have orderd Lee and Van Dorn to merge to separate stacks outside Bowling Green. While, Lee obeyed the orders, Van Dorn and few other units failed to merge.
Anyway, I am posting pre turn orders and post turn resolution images. My PBEM host will be posting complete save game files.
Thanks in advance