Metadata synchronization with XMP sidecars does not work in bidirectional mode.
into Preferences > Image Processing >Metadata :
Metadata synchronisation with XMP sidecars : Bidirectional
XMP sidecar style : Standard(FILENAME.xmp for FILENAME.ext)
If i set into Preferences > Image Processing > Processing Profile Handling :
- Processing profile saving location : Save processing profile to the cache
Of course, this does not work in bidirectional - Processing profile saving location : Save processing profile nex to the input file
a pp3 file is created and other programs like Digicam use an xmp file and not pp3