Conversation so far:
Was Subhuman race an album?
In 1994, the band returned to the studio with producer Bob Rock to record its third album.
Subhuman Race.
What was Spli with Bach?
Eventually, Bach left the band in late 1996 after an argument with Bolan.

Question: What was this argument over?
Self-contained rewrite: What was the Bach's argument with Bolan in 1996 over?