Last night I tested the rear hub well.
before going out I cleaned, degreased and blew the ratchets well, then I lubricated only the parts that rub with grease, a little grease and not thick.
during the ride the hub was perfect. never a hiring problem.
When I assembled it for the first time, I mistakenly filled the freewheel with stringy grease and it probably prevented movement, even creating suction cup or thickness effects; this was due to the malfunction.