Yoshi and the Mysterious Book Index Page Bug: Workaround and Patch Status

1. Begin the "Bewilder Bird" investigation before the tutorial. You must start this investigation prior to hearing Mr. E’s tutorial explanation of the Index. The tutorial triggers naturally after you complete the first four chapters of the game .
2. Finish the investigation without a major discovery. You must end the Bewilder Bird investigation without uncovering any significant findings .
3. Trigger the Index tutorial. After completing the failed investigation, you eventually reach the point where Mr. E explains the Index. At that moment, the soft lock engages and you can no longer leave the Index page .

If any one of these conditions is missed, the bug will not occur. Players following the standard story progression without early investigation will likely never encounter the problem.

How to avoid the bug completely

The workaround until the official patch is simple: do not research the Bewilder Bird before you hear the Index tutorial. Wait until after you have cleared the first four chapters and Mr. E’s guide activates naturally. If you have already started the investigation early, make sure you discover a major finding before finishing it. If you are unsure, the safest bet is to reload an earlier save from before you started the investigation and simply hold off until after the tutorial.

Nintendo’s response and patch timeline

Nintendo addressed the issue via its customer support channels on May 29, 2026 . The company stated it is "currently preparing an update" to resolve the problem and will provide more information once the patch is ready . Nintendo apologized for the inconvenience to players who have been affected .

No release date for the patch has been announced. For now, the manual workaround is the only way to guarantee your progress is safe.