I don’t think the poster was suggesting it was still happening now. I read it as she was still voting on bills while being rolled around and having no awareness of her surroundings or recent history.

Multiple sources tell Rolling Stone that in recent years Feinstein’s office had an on-call system — unbeknownst to Feinstein herself — to prevent the senator from ever walking around the Capitol on her own. At any given moment there was a staff member ready to jump up and stroll alongside the senator if she left her office, worried about what she’d say to reporters if left unsupervised. The system has been in place for years.

…

Feinstein once notably seemed to forget she had relinquished her role as third in line to the presidency. As the longest-serving member of the Senate majority, she would traditionally serve as president pro tempore, behind only the vice president and speaker of the House in the line of succession. Feinstein announced last October via a written statement she would voluntarily give up the title. But when asked about it three weeks later she told a reporter she was still considering what to do. The staffer quickly corrected the Senator.