ShapeUpgrade_UnifySameDomain works... sometimes

I have been trying to use the ShapeUpgrade_UnifySameDomain class but it appears to be very unstable.

Depending on the parts I am analyzing, sometimes I get the right result, sometimes I get Standard_ConstructionError or Standard_OutOfRange, and when I run in release mode the program enters an infinite loop and the function never builds.

Unfortunately, I cannot (at least not publicly) share my parts files, but maybe someone around there can help me identifying how to use it safely, and I could share some of the failing files privately if someone wants to investigate...