Self-normalised yields of electrons from heavy-flavour hadron decays measured in \pPb collisions at \sqrtsNN $= 8.16 \rm TeV$ for different \pt intervals compared with self-normalised yields of D mesons in \pPb collisions at \sqrtsNN $= 5.02 \rm TeV$. The position of the points for \pPb collisions at \sqrtsNN $= 5.02 \rm TeV$ on the $x$-axis are shifted horizontally by $\rm \delta x$ to improve the visibility.