Transponder Signal Lost is a quest step in Destiny 2: Black Armory.
Part of the Izanami Forge Quest.
"The Vex seem to have predicted your movement. The signal has been jammed by a powerful conflux in the Hallows."
Complete a Heroic Spire Integration public event to clear the interference.
- Travel down into the Hallows on Nessus.
- Wait for the Public Event, Spire Integration to appear and begin.
- Activate each of the plates and then defeat the Vex while defending the Main Spire.
- The end reward of the quest chain is Izanami Forge.