For the sake of people's sanity, I thought I would quantify and clarify everything for those of you who have found your way here in frustration.
What SHOULD happen:
1/ You and your team wake up in plain "clothing" in a jail cell. Your inventory is EMPTY.
2/ As you fight your way along, you come across THREE "Experimental Subjects".
3/ The first 'subject' (for me, at least) was wearing Velanna's items.
4/ The second and third 'subjects' were wearing the items of my remaining teammates.
5/ Along with the THIRD 'subject', and in the same room/cave, there should be a darkspawn wearing YOUR items too.
6/ When you reach a Qunari trader standing at the top of some stairs, there should be a chest.
7/ Loot the chest to reclaim all the remaining loose items from your inventory.
8/ You now have everything back that you lost and can finish the final scene.
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What the BUG is: (thank you,
Unrefined-Nemesis )
Condition 1 is CHARACTER RESTRICTED Items.
For example: If your warden or companion is equipped with a restricted item such as Warden's Oath which can only be equipped by your warden that you created, or have Anders equipped with his Fox Pendant or other characters using unique items which only they can be equipped with.
This will cause the bug to trigger.
Condition 2: Specialization Restricted items
Similar to condition 1 but this time its Specializations items like TEMPLAR's Armor and etc.
Condition 3: You're an Arcane warrior.
The bug always occurs on an arcane warrior. Strip all your arcane warriors of their equipment and enter the mine.
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How to FIX the problem:
Attempt 1:
1/ Load a saved game prior to being captured (cutscene). The save game can be in the mine or outside.
2/ Go through your entire inventory of you and your team and remove all items that are person specific. i.e. Remove 'Velanna's' "Keeper's Charm" or your (player) "Warden's Reach".
3/ If you are playing an Arcane Warrior, then remove all items. You should get the items back in the chest at the end.
3/ Continue the game.
4/ When you wake up in a cell with "clothing" on and an empty inventory, there is a good chance it will work.
5/ Play through the "SHOULD happen" list above.
6/ If you reach the third subject and a darkspawn is not wearing your gear (looted all), move on to 'Attempt 2'.
This first attempt has worked for me perfectly 6 out of 6 times. Sorry if it didn't work for you.
Attempt 2:
1/ Load a saved game prior to being captured (cutscene). The save game can be in the mine or outside.
2/ Go through your entire inventory of you and your team and remove all items that are person specific. i.e. Remove 'Velanna's' "Keeper's Charm" or your (player) "Warden's Reach".
3/ Now go through again and remove all items that are 'specialization restricted'. i.e. Remove all items that are listed as being "Mage" or "Templar" etc. General items can be left on.
3/ If you are playing an Arcane Warrior, then remove all items. You should get the items back in the chest at the end.
3/ Continue the game.
4/ When you wake up in a cell with "clothing" on and an empty inventory, there is a another good chance it will work.
5/ Play through the "SHOULD happen" list above.
If neither work, then you will have to wait for BIOWARE to get their arses in gear and finish a patch for this.
If it does work, then great! Hope you haven't been too inconvenienced.
Hope this helps,
Samustus