1.90开始下载大一点都种子，貌似超过10G就会出现，现在升级1.91后依旧存在。
下载一会就会没速度，同时会影响其他种子上传，停止任务偶尔会卡死。
停止任务后重新启动又会正常
任务日志没有异常，1.89版不会出现这个问题，但是1.89会导致内存占用暴涨。
磁链附上，仅供测试。
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