Sounds like a frustrating bug to deal with, especially when it only affects certain decks. Try clearing the app cache from your device settings and then force close the app before reopening it. If that does not work, uninstall and reinstall MTG Arena, as this often fixes corrupted deck data issues on iOS. Also, make sure your app is fully updated to the latest version since older builds sometimes have server sync problems with specific cards like Stadium Headliner. If the issue still continues after all this, I would recommend submitting a support ticket directly to Wizards with your player ID and screenshots so their team can look into the red card filter issue on their end.
Sounds like a frustrating bug to deal with, especially when it only affects certain decks. Try clearing the app cache from your device settings and then force close the app before reopening it. If that does not work, uninstall and reinstall MTG Arena, as this often fixes corrupted deck data issues on iOS. Also, make sure your app is fully updated to the latest version since older builds sometimes have server sync problems with specific cards like Stadium Headliner. If the issue still continues after all this, I would recommend submitting a support ticket directly to Wizards with your player ID and screenshots so their team can look into the red card filter issue on their end.