Unable to display network images when exporting a block as an image

[zxhd863943427]

图片导出无法导出网络图片

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

使用图片导出功能，网络图片无法导出，而是会变成空白。
思源内部查看：

导出图片预览：

导出图片后：

Expected result

网络图片能正常导出

Screenshot or screen recording presentation

No response

Version environment

- Version: 2.8.6
- Operating System: win10
- Browser (if used):

Log file

无需日志

More information

No response