I found this text in Oxygen Help
But it's not working for me. The view opened for my xsl:result-document is only refreshed once at the end of the instruction.Multiple Output Documents in XSLT 2.0 and XSLT 3.0
For XSLT 2.0 and XSLT 3.0 stylesheets that store the output in multiple files by using the xsl:result-document instruction, the content of the file created in this way is displayed dynamically while the transformation is running in an output view. There is one view for each xsl:result-document instruction so that the output is not mixed while still being presented in multiple views.
Tested in oxygen 17 to 23.0
A bug ? Something I done wrong ? I have several versions of Oxygen in my PC, could it be related to this issue ?