Undo led to turns happening that didn't

[tracer]

#3688 on frankfurt-test2

Emeric did an undo from buy phase to action phase either turn 13 or 14. This somehow led to me having a turn 14 which I did not play - something did it for me. His turn 13 may also have been messed up.

I'm not sure how else to describe what happened. Neither of us tried to undo to that point.