It's was not possible for me to reproduce this bug at home.
So here is my plan:
- I will add debug information to current games (on server side, you will see nothing).
- Each time this bug happens on your side, I need your help :
Please add a post in this thread (don't use bug report anymore for this bug, I can't repair your table).
Use this format : Table number Date Faction Action
Example: 123456789 07/31/21 Axis Can't undo assault
If you have multiple undo problem, don't create a new post each time, just edit your old one and add lines for new problems.
With debug informations and yours informations I will try to find where bug is coming.
In fact, each game has a undo stack (all previous states from start of turn to current action). When bug occurs, undo stack is empty. So I have to find what empty it. It's why I can't repair yours tables, stack is already empty when you send bug reports, so it's too late, datas have been lost.
Thanks for playing.