Temporal Sanctum key usage leads to a broken dungeon state

Some steps may be too specific, but I’ll still list them. Playing in an offline mode with legacy character.

  1. Teleport to Temporal Sanctum dungeon, enter level 4 with a key AND a portal charm.
  2. Use the portal to a boss, start a fight.
  3. When you die you will be given a choice, select 'Respawn" and use a dungeon key.
  4. Julra is now at full health, start a fight again.
  5. When a one-shot ability is telegraphed use dungeon ability to switch eras.
  6. Julra either has only one breakpoint left on a health bar or dies instantly.
  7. Rings are dropped and you can proceed to the next room, but dungeon ability disappears - neither visible on the UI nor the hotkey works.
  8. Eternity cache can’t be used since you can’t go back in the past.

Similar issue is observed in a Soulfire Bastion dungeon, but without a charm. When I die once in a boss fight the dungeon ability disappears, making the further attempts bound to fail.

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