Changes to Cataclysm were supposed to prevent the buffs from being applied without effort to successive casts of Cataclysm if they weren’t reapplied. However the changes applied have stopped a single cast of Cataclysm from maintaining the Provocation buff through out the totality of the single cast.
This is especially pronounced when a player has a lot of Ultimate Duration buffs to extend the duration of cataclysm. The Provocation buff silently drops off when it should last for as long as the original cast + duration extensions.