I have the same problem with Tr. For example
4 \[Gamma]^\[Mu] (DiracCanonical->False)^2 (Factoring->False)^2 (FeynCalcInternal->True)^2 (InsideDiracTrace->True)^2,
i.e. it gives also the options and somehow leaves the gamma matrix untouched. One can also see this behavior, when trying the pair production example in the help system.
Does anyone know a workaround?
Thanks in advance,
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