@Robz8 I am not sure why this happens but it does. A game called Polarium seems to softlock TWLoader when using the flashcart method. Not nds-bootstrap but the menu itself, most likely being triggered trying to load the icon data. It isn't a corrupted rom as I dumped it with GM9 and ran it on an flashcart only for it to not crash and load just fine. When I load it up, nothing is on the top screen as normal as it's loading boxart, only to softlock when it shows Polarium with no info.
Here is what it looks like on the bottom screen, it is softlocked as I cannot move the menu at all.
Here is what it looks like on the bottom screen, it is softlocked as I cannot move the menu at all.