These incidents may not be linked, said security expert Dr Johan Burger, but were likely to be top of mind for those charged with ensuring Sona goes according to plan.
The annual event marks the opening of Parliament and is being held at the Cape Town City Hall because a fire damaged the National Assembly chamber last month.
President Ramaphosa toured the building where, in this month in 1990, he joined Nelson Mandela on the balcony to give his first speech after being released from prison.