Why did he leave the series after the eighth season (List_of_Murphy_Brown_episodes#Season_8_(1995–96))? What did he do to create such ill will that they didn't even invited him back as Miles for the finale in 1998?

Why did he leave the series after the eighth season (http://List_of_Murphy_Brown_episodes#Season_8_(1995–96))? What did he do to create such ill will that they didn't even invited him back as Miles for the finale in 1998?

He definitely was invited (https://www.deseret.com/1998/1/16/19358140/murphy-brown-to-meet-its-end-but-bergen-s-character-won-t). At the time, Candace Bergen said this:


"Grant [Shaud], I think, has more complicated feelings about coming back," Bergen added. "I think he's quite pleased to have put some distance between who he is and who [the character of] Miles Silverberg is. I'm not sure that was a marriage that he was always very happy with, being sort of identified as this neurotic sort of nerd. Sort of understandable.
"So I don't think we know if Grant will be back. But I certainly hope so."