[sparta_binauraliser] OSC control from multiple head trackers is not working with multiple plug-in instances

[DAG-BF]

Test condition

• DAW: Reaper
• OS: Win10, MacOS 12.7
• head tracker: Head tracker 1 from Supperware

Issue
When multiple plugin instances are active only the deafult configuration receives the OSC messages from the head tracker.
The other instances do not receive any OSC control.

Note

• The plug-in (MacOS) version reports the message: "OSC failed to connect on port: already taken"
• Same DAW and head tracker (in multiple istances) works fine with different party plug-ins