It says I've done Hard dungeon, and yet

Platform, device and operation system
PC using BlueStacks, but it happens on my google tablet, too.

What were you expecting to happen, and what actually happened
I’ve selected a dungeon to loot. Right on the screen is says “The highest completed is HARD.” HARD is selected. But when I click play it tells me I have to complete the HARD level to use a loot ticket. So… confused.

How often does this happen? When did it begin happening?
Depending on which dungeon it is reliable. This is not true for all dungeons. I’m using Clockwork Halls as my example.

Steps to make it happen again
I’m attaching pics to show the issue.