Thank you for your reply. I have attached the log file. I apologize for the inconvenience, but please take a look. crash_log.txt

Additional information The app was developed using Unity. After contacting Unity, they indicated that based on the crash logs, it is highly likely that a “Segmentation Fault” occurred. I suspect the “Segmentation Fault” is caused by insufficient memory, but is it possible that memory usage has increased significantly in iOS 26.4 compared to previous OS versions?

We have confirmed this issue also occurs in iOS 26.3.1. In the app we are developing, this bug significantly impairs the app's main functionality, so we would like you to fix it as soon as possible.