How do soul sleep adherents explain 1 Peter 3:18-20?

>1 Peter 3:18-20: Because even Messiah once suffered for sins, the righteous for the unrighteous, to bring you to Elohim, having been put to death indeed in flesh but made alive in the Spirit, 19 in which also He went and proclaimed unto the spirits in prison, 20 who were disobedient at one time when the patience of Elohim waited in the days of Noaḥ, while the ark was being prepared, in which a few, that is, eight beings, were saved through water, This seems to disprove consciousness ceases at death.