In the Wolfship Turbine lost sector in the Tangled Shore on PC, I have gone through and killed all enemies but the door to the chest still will not let me through. I have tried closing the game completely and restarting the lost sector but the doorway leading to the chest continues to have the weird hive-ey goop stuff across it stopping me from getting through.
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I just had this same issue. Defeated the enemies but the door/hive goop wouldn't open up to allow me to get the treasure chest.