Japanese version of iPhone 16 Pro Max DingTalk check-in abnormally in a subway station. Help: Cellular data is normal and positioning fails frequently

1. Abnormal phenomenon: After entering the subway station, the DingTalk positioning continues to deviate or displays "positioning failure", and the punch-in cannot be completed; Changing the Gaode map and the self-brought map can't be positioned normally; The cellular data signal displays normal (LTE/4G identification), and attempts to manually switch to 4G are sporadically successful; Switch to an Android phone (such as Huawei Mate series) at the same location to punch in normally; After leaving the station, the positioning returned to stability, and the problem only appeared in the subway station. 2. Tried solutions: Confirm that the cellular data function is normal and the virtual positioning software is not installed; Turn off Wi-Fi, restart location services, and update DingTalk to the latest version; Manually switching network mode to 4G (partially mitigating the problem, but low success rate); Replace multiple subway stations for testing, and the problem reappears. Currently using China Mobile's sim card, please help me see if this problem is common in the Japanese version of iPhone, or is it an example, is there a solution