https://doi.org/10.1016/j.molstruc.2010.11.061
I think this may be one of the more detailed studies on Decarboxylation of Cannabinoic acid.
Since it seems ethanol always contains 5% or more
H2O , I can only say from my experience that decarboxylation will proceed in Ethanol solutions.
Exactly why I can not say with any certainty. But the above reference shows rates suggesting water catalysis…