This has been bugging me for awhile.

If a passive ability like Shield Oath or Kiss of the Viper is active and you level sync down for a dungeon or fate, the ability is removed.

Please instead make the buff sync to the level of that buff relative to the sync, and resync when your normal level is restored.

The only time removal should be acceptable is if you aren't able to use that buff at all in the synced level.