After a Recent spar with other users it came to our attention that Grand upper allows you to walk on unwalkable tiles with in towns and on the overworld once the spar is over. As far as we know only reboot and sitting on chair fix this. It would be great if this was fixed so that users aren't being accused of bug abusing or hacking of the sort.
Also during this we got some screenshots which will help show what we mean.
To clarify, this bug only occurs when you use grand-upper on an enemy and then leave battle afterward. The icon offset from being grand-upper'd isn't restored back to its default state.
You can only access areas like normal, as it's only an icon offset bug.
The said bug also occurs if you win the battle while you are granduppered. It will offset your player icon, making you look as if you were a couple tiles above where you actually are. This does not fix between maps, but a list of temporary ways to fix it are as such:
Sit on a chair and reposition yourself. (You'll have to know where your actual character is, not the icon you see.)
Reboot or relogging.
Going into battle, your sprite is still offset, and grandupper can further offset it, so you can offset yourself more and more, and make it look like you're walking on walls.
Regarding the above post, it is unknown if winning is a requirement, but the times we tested this, both players were alive by the time we left the battle.