Catch2 junit reporter suddenly writes empty file

[FredM67]

Describe the bug
When running my tests with the junit reporter without "--out", I get the report in the console. When running the exact same exe with "--out test.xml", the test.xml is empty (zero byte).
Calling the exact same exe with exact same arguments from within Visual Studio produces a non-empty file !!

Expected behavior
The output file shouldn't be empty

Reproduction steps
No idea, it broke suddenly, perhaps due to compiler update ?!?

Platform information:

• OS: Windows NT
• Compiler+version: Visual Studio 17.4.14
• Catch version: v2.13.10

Additional context
Add any other context about the problem here.