The Destiny 2 Nightfall has been swapped out for another this week, developer Bungie today confirmed.
To mitigate issues encountered by players in the Exodus Crash Nightfall strike, this week's Nightfall has been changed to Pyramidion.
— Bungie Help (@BungieHelp) October 18, 2017
The “issues encountered” revolve around critical Arc Pulses needed to progress. Occasionally, those pulses didn’t spawn, stopping Guardians in their tracks.
The challenging Strike was criticised by players as its endboss frequently disappears during battle, eating away at an already-tight countdown.
This week’s Exodus Crash Nightfall had Prism and Timewarp: Rings enabled, so players needed to jump through hoops to gain more time and deal with a rotating element burn.
The new Nightfall, Pyramidion, has Torrent (increased skill recharge) and Timewarp: Zero Hour (no time extensions) enabled.