2.9.5版本 使用手机的网络伺服功能在导出文档时无法导出题头图

Is there an existing issue for this?

• I have searched the existing issues

Can the issue be reproduced with the default theme (daylight/midnight)?

• I was able to reproduce the issue with the default theme

Could the issue be due to extensions?

• I've ruled out the possibility that the extension is causing the problem.

Describe the problem

手机开启浏览器伺服，同局域网中的电脑上使用浏览器访问手机思源，使用导出.sy.zip功能时无法将文档中的题头图导出。我导出了不同的有题头图的文档，在生成的.sy.zip中均未在压缩包中assets中发现题头图资源文件。文档中其他图片文件正常导出。
手机端版本2.9.5

Expected result

使用手机端的网络伺服并使用浏览器打开时在导出.sy.zip时能正常地导出题头图文件

Screenshot or screen recording presentation

No response

Version environment

- Version: 2.9.5
- Operating System: 手机：Android 11 MIUI 12.5.12; 电脑：windows 10 22H2
- Browser (if used): Microsoft Edge 版本 114.0.1823.58 (正式版本) (64 位)

Log file

siyuan.log

More information

No response