I don't have Studio One, but from what I read, it is becoming more popular. Someone here must have experience with it.

The only thing I can offer is, have you explored the options in the BIAB DAW Plug-in Options dialog box? Click on the DAW Plugin icon, and select Options. Make sure Drag Audio is set to WAV. Explore if Studio One requires a Custom Drag 'n Drop Temp Folder location, perhaps in some part of the Studio One data files area. That is one question Presonus could answer. Perhaps the program has default or adjustable settings for where it looks for files it needs.

Have you called PG Music Support?

Good luck!

ps It's always difficult when the march of technology makes obsolete something that you like and that works. I'm facing that now with a ten year-old Tascam unit. I like your approach, to explore alternatives before it doesn't work as well as isn't supported.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.