Usual problem with MAPs not used in this war https://politicsandwar.com/nation/war/timeline/war=525809
This time not with naval attacks but with an airstrike, wasted the MAPs with a fortify
I created a "calibration" script to calculate how many MAPs a war should have, and update it if it's greater than the calibrated amount.
Because you did some attacks before that shouldn't have happened due to MAP restrictions, it must be deducting your new MAPs immediately.