The official synopsis for The Conners season 6, episode 2 reveals Bev's return and her new problem. ABC has officially returned to Lanford with a surprisingly emotional season 6 premiere for the eponymous family. Moving forward, The Conners season 6 will pick up on lingering plots, including the long-gestating arc for Jackie and Roseanne's mom. Bev has been suffering from dementia for quite a while now, but when she re-emerges, she will have a new issue.
https://screenrant.com/the-conners-season-6-episode-2-synopsis-bev/