Solution for biasing deexcitation processes

Particles, Track, Event, Run and Biasing
1

_Geant4 Version: 11.3.0
_Operating System: Linux
_Compiler/Version: g++ (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
_CMake Version: 3.16.3

I am trying to apply biasing for bremsstrahlung and characteristic radiation in a simulation of an X-ray source. Currently I have implemented the splitting method used in example GB04 for biasing of the bremsstrahlung process, then applied the splitting to bremsstrahlung by typing this in main:

int main(int argc,char** argv)
{
...
    auto physlist = new FTFP_BERT;
    physlist->ReplacePhysics(new G4EmPenelopePhysics());

    
    // Create a biasing physics instance for bremsstrahlung
    G4GenericBiasingPhysics* biasBremPhysics = new G4GenericBiasingPhysics();

    // Define processes to bias
    std::vector<G4String> bremProcess;
    bremProcess.push_back("eBrem");      // Bremsstrahlung

    // Apply biasing to electron processes
    biasBremPhysics->PhysicsBias("e-", bremProcess);
    biasBremPhysics->PhysicsBias("e+", bremProcess);

    physlist->RegisterPhysics(biasBremPhysics);


    
    //  Create a biasing physics instance for deexcitation
    G4GenericBiasingPhysics* biasCharPhysics = new G4GenericBiasingPhysics();

    std::vector<G4String> charProcess;
    charProcess.push_back("fluo");   // Atomic deexcitation - fluorescence

    biasCharPhysics->PhysicsBias("e-", charProcess);
    biasCharPhysics->PhysicsBias("e+", charProcess);
    physlist->RegisterPhysics(biasCharPhysics); 
    
...
}

This works fine for the bremsstrahlung but when I also try to apply this splitting operator to the deexcitation process, nothing happens. In my mind the splitting operator should be process agnostic since I am defining the process to bias in main, not the operator. How does one bias the deexcitation process in this way? I need some help understanding why this does not work!