The calculation of the aggregation function max() stops when adding new records in a repeat. (webapp)

[COORDINADORSIGSecretariadeInfr]

I request help from the max() aggregation function, which is applied to several date type attributes that are inside a Repeat. The idea is that it always calculates the most recent date, outside the repeat.
The problem is the following. Then publish the survey and open it in the web browser. The max() function works for the first record of the repeat, and the first attribute of the parent table, as I add more records, the max() calculation stops working and the calculation is not performed for the following attributes. I attach the xlsforms and an explanatory video. I hope someone can help me.