What's that gemma?
Possibility: the "Robin Foot's spaced out!" message would have been appearing right around when the chest's windows showed up. If the GP window's text and the combat message text share memory addresses (the devs could have assumed those types of messages would never be displayed simultaneously), that could lead to an overflow.
RAM to watch: the text contained in the GP View window is 7EA1E0 - 7EA1E8. 7EA1E9 appears to be a null terminator.
That RAM is not apparently re-used very often; my file at the Mana Beast managed to go through the entirety of the Purelands and Mana Fortress without changing the values since showing up at Neko. The Status, Weapon Status, and Controller Edit screens borrow that memory, but I cannot find anything else that does. So the text itself is probably not at fault.
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I think what we're dealing with is a rare follow-up bug to the one that makes the screen, apparently at random, either have or not have a palette explosion as the GP window is loaded from chests (it often happens in Elinee's room, for instance). If we knew the technical information on why the screen freaks out, we might find some specific combination of apparently unrelated variables that would make the game do something crazy like what happened to BJW, rather than just something that gets immediately repaired as usual. Notice that a similar screen flash happens during BJW's anomaly.
RAM to watch: the text contained in the GP View window is 7EA1E0 - 7EA1E8. 7EA1E9 appears to be a null terminator.
That RAM is not apparently re-used very often; my file at the Mana Beast managed to go through the entirety of the Purelands and Mana Fortress without changing the values since showing up at Neko. The Status, Weapon Status, and Controller Edit screens borrow that memory, but I cannot find anything else that does. So the text itself is probably not at fault.
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I think what we're dealing with is a rare follow-up bug to the one that makes the screen, apparently at random, either have or not have a palette explosion as the GP window is loaded from chests (it often happens in Elinee's room, for instance). If we knew the technical information on why the screen freaks out, we might find some specific combination of apparently unrelated variables that would make the game do something crazy like what happened to BJW, rather than just something that gets immediately repaired as usual. Notice that a similar screen flash happens during BJW's anomaly.