So Kingdom Hearts 1.5 + 2.5 ReMIX for the Playstation 4 came out on March 9th in Japan. However, since the game's release, it's been plagued with various bugs, likely as a result of the game changing to 60 FPS.

Last night, Square Enix updated the game and have seemed to fix various bugs including (but not limited to):

• Data Vexen and Data Saix battles fixed. Their gauges would fill twice as quickly due to 60fps, making the fights much harder.
  
• Roxas: Fifth Day, Bag mini game fixed. Would end in half the time, again due to 60fps
  
• Quick Run distance restored to normal: Sora would only travel half the intended distance before.

Hopefully with this patch, the North American and World Wide versions of the game will receive day one patches, when the games are released.

Source: Youtuber and Kh Speedrunner, Bizkit047, and his Pastebin, which he will be updating as he finds more information about the patch.

Thanks to @Explode for letting us know!