Youguang Xing Xu Luo 0003 Junlin Xie Lianli Gao Hengtao Shen Jingkuan Song Shortcut Learning in Generalist Robot Policies: The Role of Dataset Diversity and Fragmentation. 2025 August abs/2508.06426 CoRR https://doi.org/10.48550/arXiv.2508.06426 db/journals/corr/corr2508.html#abs-2508-06426 streams/journals/corr