I have other 32 bit DAWs I just use VSTHost x64 with VSTHost Slavery Suite (LegreeI.dll VSTi or Legree.dll VST) but in BB/RB it just keeps Looping the 1st bar as so many other VSTi/VST do in BB/RB.
This prevents me from using them NOT the 32bit issue.
In Adobe Audition that has NO midi support anymore I can use EZDrummer now with VSTHost x64.
That would be a Fix before going to 64bit, but I don't know, maybe it is a long standing issue that can't be fixed easily ?

VST_Loop.mp4
VST_Loop.wmv

Thanks,
SR

Also if that worked you could use wav player VSTs to add more tracks to BIAB.