Hi, I would like to work with non-commuting objects. I dont want them to commute under any circumstance unless I told them to do so. My fields are {A*{\mu}, A^{I}*{\mu}, \alpha, \alpha^{I}}. The indices are free to be raised and lowered. Nevertheless in some special combinations, when partial derivatives are involved, they commute. I'm not sure if I'm making some mistake in my code or it's a bug. Here is my code:

```
{a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}::Indices(full, position=free);
{\mu,\nu,\rho,\gamma,\kappa,\tau,\lambda,\epsilon,eta}::Indices(subspace1, position=free, parent=full);
{I,J,K,L,M,N}::Indices(subspace2, position=free, parent=full);
\partial{#}::PartialDerivative;
A{#}::Depends(\partial{#});
A{#}::SelfNonCommuting;
{A{#}, \alpha{#} ,\alpha}::NonCommuting;
exp1:=\partial_{J}{A^{I}_{\nu}}\alpha^{K}\partial_{K}{A^{J}_{\mu}} + \partial_{K}{A^{J}_{\mu}}\alpha^{K}\partial_{J}{A^{I}_{\nu}};
unwrap(_);
sort_product(_);
canonicalise(_);
exp2:=\partial_{J}{A^{I}_{\nu}}\partial_{I}{A^{J}_{\mu}} + \partial_{I}{A^{J}_{\mu}}\partial_{J}{A^{I}_{\nu}};
unwrap(_);
sort_product(_);
canonicalise(_);
```

I'm expecting expression "exp1" and "exp2" to not change at all, but, however, terms in both expressions add up together. How can I avoid this to happen?

Thank you in advance

Victor