@林汤圆 I have created an issue to fix this problem: https://github.com/EsotericSoftware/spine-editor/issues/849
Actually, we had received some reports that some image areas could be lost when using polygon packing if there were multiple mesh attachments referencing the same image and trimming a specific area using the mesh hull, but we had not found it possible to reproduce this simplified case, so the reproduction project you sent us was very helpful. Unfortunately, we cannot say when this will be fixed, so until we can fix it, we would appreciate it if you could modify the image paths so that they refer to separate images rather than the same image.