Refusal Falls off a Cliff: How Safety Alignment Fails in Reasoning? - Qingyu Yin; Chak Tou Leong; Linyi Yang; Wenxuan Huang 001; Wenjie Li 002; Xiting Wang; Jaehong Yoon; YunXing; XingYu; Jinjin Gu (CoRR, 2025)