Interesting.
In case anyone also got curious about the vaccines that encode the spike protein:
It is established that the vaccine induces transient expression of the spike protein within the organism following intramuscular injection, with the generated protein being rapidly cleared from the system. There is limited evidence to suggest that vaccinated individuals accumulate significant levels of spike protein in the brain.
In fact, several studies suggest that the vaccination mitigates cognitive impairments associated with COVID-19 infection and does not increase the risk of psychiatric adverse events.
So it seems like vaccination proteins are cleared out fast enough to not cause this issue.
Disclaimer: I'm not in anyway medically trained