SAP Incident MIRO Wrong calculus MM MIRO

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We have a case that was working in all three environments and we realized that in the first half of that month, the QAS and PRD stopped working.
We set the scenario to include the PIS / COFINS in the net price and this causes in TAXBRA to activate the offset conditions by zeroing the tax field because the value is within the net value.
View: J_1BKON1V
ZLD - Despite the PIS / COFINS calculation, see that the Tax field is zero due to the above configuration:
QAS Já no QAS e na PRD é como se o standard tivesse ignorando a configuração acima e adicionando no liquido o imposto (campo imposto) para chegar no montante final
We have seen that you have a note applied in QAS .. but it is not in Production. I believe that the determine_adjusted_net method is that SAP considers that configuration above.
I guess could be something on:
CLASS: CL_TAX_CALC_BR
or
FUNCTION: MRM_FINAL_CHECK
I also checked the SAP NOTES:
2539805 - MIRO/MIR4: Various corrections for invoice reduction
Of: Version 3 from 08.11.2017 in EnglishShow Changes
It deals with:
ou enter a logistics invoice with manual invoice reduction
1) You do not enter a tax amount, or you enter a tax amount that is smaller than the amount automatically calculated in the credit memo.
If the ‘Basic data’ tab page is active and a header tax code is set, the system issues corresponding error messages.
These messages are (incorrectly) not issued if:
a) the ‘Basic data’ tab page is active and the header tax code is missing
b) the ‘Tax’ tab page is active.
If the invoice contains only items with complete invoice reduction (quantity and amount = 0), the tax base is determined incorrectly.
2) If the ‘Tax’ tab page is active, error messages from the tax calculation may not appear in the log.
3) In the case of certain error messages from the tax calculation (e.g. FF 796), the messages are not written to the log, but are displayed directly in the status bar. As a result, there is no option to correct this data.
4) You have parked the invoice with manual invoice reduction. You use transaction MIR4 to postprocess the parked document. Then you choose ‘Update Allocation’. Afterwards, previously entered invoice reduction data may be lost during parking.
COULD YOU CHECK PLEASE IF WE ARE IN THE RIGHT WAY.
I tried to apply the sap note: 2539805 
Best regards
Denner S F Andrade
Other information: