I've run 3 court of blades so far and 2 of them have soft locked, one was the 2 knights that appeared for a second and then despawned. The other didn't even spawn in. The augments were both different as well
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I've seen the same issue... both were with the 45 enemies augment and both were in the same area (final area of exotic mission)... both were hive for that matter. 45 thrall would spawn in, but nothing else!