  The recent JWST tentative discovery of a population of super-early (redshift
$z> 10$), relatively massive (stellar mass $M_* = 10^{8-9} M_{\odot}$) and
evolved (metallicity $Z \approx 0.1 Z_{\odot}$) galaxies, which nevertheless
show blue ($\beta \simeq -2.6$) spectra, and very small dust attenuation
($A_{\rm V} \leq 0.02$), challenges our interpretation of these systems. To
solve the puzzle we propose two solutions in which dust is either (a) ejected
by radiation pressure, or (b) segregated with respect to UV-emitting regions.
We clarify the conditions for which the two scenarios apply, and show that they
can be discriminated by ALMA observations, such as the recent non-detection of
the $88\mu m$ dust continuum in GHZ2 ($z\simeq 12$) favouring dust ejection.
