On March 30, 2022, Willis’s family announced that he was retiring because he had been diagnosed with aphasia, a disorder typically caused by damage to the area of the brain that controls language expression and comprehension.[66][67] The Golden Raspberry Awards retracted its Willis category, deeming it inappropriate to give a Razzie to someone whose performance was affected by a medical condition.[68] At the time of his retirement, Willis had completed 11 films awaiting release.[66][69][70]
On February 16, 2023, Willis’s family announced that he had been diagnosed with frontotemporal dementia.[71] According to Gregg Day, a neurologist at the Mayo Clinic’s Florida campus, the symptoms include difficulties with language and comprehension, and misinterpretation of instructions.[72] In a statement, the family said that Willis’s condition had progressed and that “challenges with communication are just one symptom of the disease”.[73] They expressed hope that media attention on Willis would raise awareness about the disease.[74]
I thought his retirement from acting was due to the aphasia?
Yeah, that’s right.
https://en.wikipedia.org/wiki/Bruce_Willis