Why does P6 not prompt to answer Yes or No to changing the Earned Value technique

Product: Primavera P6 Professional 19 Release 19.12.0.34128 (stand-alone SQLLite database)

Primary issue: The Performance Percent Complete is not being calculated, and therefore neither is Earned Value Cost, SPI, CPI etc.

Upon checking I have all the right settings, I notice that when I change the Earned Value technique (as directed by Oracle Support Doc ID 891089.1) for the project level WBS, P6 does not ask whether I want to change child WBS elements. I've also observed that these setting are not preserved after the closure and reopening of the project.

Has anyone experienced this and found a solution?