Or, possibly, the inherit = MEX event (61001).
As far as I can make sense of the events we have for Mexico:
32002 (MEX) activates when MEX has lost certain provinces.
It triggers:
61001 (U07) which makes U07 inherit MEX.
If MEX no longer exists, either by this event or through gameplay,
61002 (U07) triggers, changing U07 to MEX.
This also triggers
32003 (MEX) changing the capital back to Mexico City.
Which seems like a lot of fuss in order to ensure that the winner of the Civil War is called "Mexico" instead of "Revolutionary Mexico". I'm tempted not to bother: we have "Soviet Russia", so what's wrong with "Revolutionary Mexico" as a country name? And, for that matter, Monterrey (or wherever) being the new revolutionary capital? In short, try deleting these four events, and see if the problem still happens...
As far as I can make sense of the events we have for Mexico:
32002 (MEX) activates when MEX has lost certain provinces.
It triggers:
61001 (U07) which makes U07 inherit MEX.
If MEX no longer exists, either by this event or through gameplay,
61002 (U07) triggers, changing U07 to MEX.
This also triggers
32003 (MEX) changing the capital back to Mexico City.
Which seems like a lot of fuss in order to ensure that the winner of the Civil War is called "Mexico" instead of "Revolutionary Mexico". I'm tempted not to bother: we have "Soviet Russia", so what's wrong with "Revolutionary Mexico" as a country name? And, for that matter, Monterrey (or wherever) being the new revolutionary capital? In short, try deleting these four events, and see if the problem still happens...