Today's update saw cauldrons placed at War's Retreat, which grant an hour of Elder Overload boost.
A problem I have encountered is that the 59 minutes only lasts for the combat skill boost. Overload salves contain anti-poison, super anti-fire, prayer renewal. None of which last any longer than 6 minutes.
Original message details are unavailable.
It's a bug. They're launching hotfix soon.
https://www.reddit.com/r/runescape/comments/16rob19/overload_couldren_not_giving_salve_buff
Should have been fixed 8 hours as Mod Sponge spoke from the very same thread:
"
JagexSponge
•
8 hr. ago
the 6mins issue; i'm fixing as we speak, will look to hotfix when tested"