Measurements of the branching ratios of B → D^(*)τν¯/B → D^(*)ℓν¯ and B_c → J/ψτν¯/B_c → J/ψℓν¯ by the BABAR, Belle and LHCb collaborations consistently point towards an abundance of taus compared to channels with light leptons. However, the ratio Λ_b → Λ_cτν¯/Λ_b → Λ_cℓν¯ shows a relative deficit in taus. In this paper, we critically address whether data still points towards a coherent pattern of deviations, in particular in light of the sum rule relating these decays in a model-independent way. We find that no common new physics explanation of all ratios is possible (within 2σ or 1.5σ, depending on the R(Λ_c) normalization to light lepton channels). While this inconsistency could be a statistical fluctuation, further measurements are required in order to converge to a coherent pattern of experimental results.