Hi Everyone,
Unfortunately, Rumble Defense Decks are not working as intended. We are working diligently to get them fixed, and aim for the fix to be implemented before this Rumble is over.
You may need to set your attack deck as the defense deck in order to get the right deck when you attack.
If your progress was significantly affected, reach out to support for more help.
Thank you!
UPDATE - This issue has been fixed.