What novel bug was found?

 title: 'Figure 8 | List of Gemini models and their performance on a selection of external multiple-choice question benchmarks for biology and chemistry. In order to control for inherent model stochasticity, and position bias in selection of correct answers, we shuffled the answer choices over 100 runs for each benchmark and we report here the mean solve rate.'

While the Gemini Plays Pokémon agent was solving the Seafoam Islands dungeon, it encountered a novel bug in the code of Pokémon Red/Blue[1]. It is likely the first AI to find a bug in the game's code[1]. This bug occurred while navigating the multi-level dungeon[1].

The Seafoam Islands dungeon contains five floors involving multiple boulder puzzles, and the players must navigate mazes and push boulders through holes across multiple floors using HM04 STRENGTH[1]. The players must track information across the five different maps[1].