E1: 03B: P03B11 removes the changed Tax/Rate code and displays the default one

Hello,

I'm working on E1 9.2 / Tools Release:  9.2.5.1

When I enter a new customer invoice via P03B11|ZJDE0001, I encounter the following issue:

I override the default Tax/Area code (captured from the customer master data) and the related amounts (Tax Amount and Amount Taxable), replacing them with a Tax code (with a rate of 0% - Non taxable), and clearing the Tax amount and Amount taxable (setting them to blank). Then, when I click on the row below, it ignores the changes and displays the initial values (Default Tax code with the calculated tax amount and Taxable amount)."

We apply Tax Expl Code V. I have tried with the Tax Expl Code E, it overrides changes and displays initial values (same result).