Creeper overhaul creepers from 1.18.2 don't get affected by the kitty sleepers, only the vanilla creeper. perhaps this can be changed so it affects all of creeper overhaul's creepers?

Thanks for opening your issue here.
florensie#68

Link to mod page: https://www.curseforge.com/minecraft/mc-mods/creeper-overhaul

Fixed in version 1.18.2-4.2.0