Inconsistent behaviour of materialise wrt Aux

[jpbrodrick89]

My understanding of materialise is that after calling it a first time, calling it again should have no impact. However, JacobianLinearOperator's materialise returns an AuxLinearOperator but AuxLinearOperator's materialise strips the aux. Which is the correct behaviour (strip or keep aux)?

[patrick-kidger]

Ah, I think that's a mistake. It should keep the aux!