  We argue that conclusions of [PRL 123, 082501 (2019)] are incorrect. The
authors present the direct observation of beta-delayed proton emission in the
beta decay of 11Be. From the determined branching ratio for this process and
from the energy spectrum of emitted protons the existence of a so far
unobserved narrow resonance in 11Be was deduced. The given beta strength for
the transition to this state is however wrong. In addition, we show that the
combination of peak position and branching ratio is in strong disagreement with
models considered by the authors. Furthermore, we identify several deficiencies
in the analysis, and we provide possible sources of background, that could
explain the error.
