This will happen if Ganon is not the dungeon boss and he sppears, you kill him once, then come back in a later playthrough, and leave the doors that open.
It's a rare occurrence, but there is a good example if you beat him in Lv. 11 of New Quest 2003 and 2013 of this.
When the videos of this go live in a couple of days on schedule I will link the timestamps.
Generally on the rare side, but can happen.
-James
Thank you James. Let us know when the videos are up, and working.
[MENTION=42228]ZoriaRPG[/MENTION]:
https://youtu.be/GKFtWL9xh7Y?t=1m28s
First version is up now. 1:31 if the link doesn't work.
-James
[MENTION=38509]Nightmare[/MENTION]... you should know better.
Demo Quest Please...
This has been fixed in 2.53's latest beta.
[MENTION=42228]ZoriaRPG[/MENTION] apparently found this already. 😊
-James
TBH, I do not know who fixed this, or when it was corrected. I'll note it in the changelog somehow, as an unattributed bugfix, unless someone knows who did it, and when. It seems like an incidental bugfix.