Bug introduced in 11.1 or earlier and fixed in 11.3.0
Just a simple expression in version 11.2, Windows 10
Reduce[(-2)^n > 1, n, Integers]
n ∈ Integers && n >= 2
But this result is not correct because it should be
n / 2 ∈ Integers && n >= 2
Furthermore, I remember that in previous version, e.g. 10.x,
Reduce works properly.
Wolfram Alpha behaves inconsistently.