CLI reports "Export Failed" but export was successful

[daemonPainter]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

You must agree to search and the code of conduct. You must fill in this entire template. If you delete part/all or miss parts out your issue will be closed.

Describe the bug
CLI recursive export of multiple drawio to PNG files reports Error: Export Failed: <filename>, but the export appears to be successful.

To Reproduce
Steps to reproduce the behavior:

1. No-install version is executed via command line
2. Execute the following command in a folder containing multiple drawings; bug is sporadic, it appears to happen more frequently when overriding existing PNGs in the same folder. The folder is backed up via OneDrive
3. run draw.io.exe -x -f png -t -r .
4. Observe error

Expected behavior
No error reports should be generated upon successful exports.

Screenshots
If applicable, add screenshots to help explain your problem.

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version 28.2.8

Desktop (please complete the following information):

• Windows 11

Additional context
Behavior described in #2246 also applies