BUG:GaussSeidel smoother
 

In my test I set solver of pEqn smoothSolver GaussSeidel,and run pisoFoam in case "cavity" with 4 processors,output show that pEqn can not reach a convergece within the limit of 1000 sweeps while It reach convergence in serial case .
I guess the problem is In GaussSeidelSmoother.C

forAll(mBouCoeffs,patchi)
{
if(interfaces_.set(patchi))
{
mBouCoeffs[patchi].negate();
}
}
the interfaceBouCoeffs_ for coupled boundary was negated . but why the kEqn whit the same setting reached convergence ?