The Galactic black hole transient GRS1915+105 is famous for its markedly
variable X-ray and radio behaviour, and for being the archetypal galactic
source of relativistic jets. It entered an X-ray outburst in 1992 and has been
active ever since. Since 2018 GRS1915+105 has declined into an extended
low-flux X-ray plateau, occasionally interrupted by multi-wavelength flares.
Here we report the radio and X-ray properties of GRS1915+105 collected in this
new phase, and compare the recent data to historic observations. We find that
while the X-ray emission remained unprecedentedly low for most of the time
following the decline in 2018, the radio emission shows a clear mode change
half way through the extended X-ray plateau in 2019 June: from low flux (~3mJy)
and limited variability, to marked flaring with fluxes two orders of magnitude
larger. GRS1915+105 appears to have entered a low-luminosity canonical hard
state, and then transitioned to an unusual accretion phase, characterised by
heavy X-ray absorption/obscuration. Hence, we argue that a local absorber hides
from the observer the accretion processes feeding the variable jet responsible
for the radio flaring. The radio-X-ray correlation suggests that the current
low X-ray flux state may be a signature of a super-Eddington state akin to the
X-ray binaries SS433 or V404 Cyg