The “workshop” section in the mythic Operation: Mechagon dungeon does not unlock after clearing the “junkyard” section. The yellow sparkly wall is still there. Re-loging and resetting all instances doe nothing. Waiting a day does nothing. Haven’t tried my luck on a second character.
04/04/2021 Edit: Cleared with a different character, didn’t encounter the same issue. Could not discern any way to trigger or avoid the the bug.