  We show that perturbations of a scalar field in the background of the black
hole obtained with the Starobinsky-Bel-Robinson Gravity is unstable unless the
dimensionless coupling $\beta$ describing the compactification of M-theory is
small enough. In the sector of stability quasinormal spectrum show peculiar
behavior both in the frequency and time domains: the ringing consists of two
stages where two different modes dominate. The WKB method does not reproduce
part of the spectrum including the fundamental mode, which is responsible for
the first stage of the ringing. As a result, the correspondence between the
high frequency quasinormal modes and characteristics of the null geodesics
reproduces only one branch of the eikonal spectrum. The frequencies are
obtained with the help of three methods (Frobenius, WKB and time-domain
integration) with excellent agreement among them.
