Our reasoning for CNO and CO + is based on the %T1 diagnostic for UCCSD and large deviations of the latter from UCC3 numbers published in Ref. 38, which coincide also with large outliers for assessed TD(A)-DHDFs in this work. A %T1 diagnostic under 90 was used to identify problematic excitations. The reported 2 Σ + excitation energy for CNO at the UCCSD level is 2.24 eV ( %T1 = 88.00), which represents a deviation of 0.49 eV compared to UCC3. Similarly, many (but not all) DHDFs have large deviations between 0.99 eV (TD-PBE-QIDH) and 1.35 eV (TDA-RSX-QIDH) The UCCSD excitation energy for the 2 Π transition in CO + is 3.60 (%T1 = 87.79), which is why it was ruled out, too. Note that we had already discarded the 2 Σ + transition of the same molecule due to problems with this state. Its %T1 is 87.96 and its double excitation character might be a potential answer for the problems we alluded to in Section 3.