Dynamic calc member with member formula suddenly incorrect in Prod

Summary:

Hi,

We encountered a specific issue several times now. The dynamic calc members with a member formula was suddenly not calculating correctly anymore or was even empty in Production, but in Test environment it worked fine. Checking the Two-pass calc checkbox resolved the issue each time. However this checkbox was never checked before in both Prod and Test and always worked.

Does someone know what the cause is of this sudden change in behavior, is it related to some recent releases?

Thanks!