Back at the end of her term as SOS she had some sort of brain injury causing double vision requiring prism glasses and a variety of other symptoms. The other episodes suggest something is wrong. It is also pretty clearly neurological like Parkinsons. Falls can be caused by Parkinsons and perhaps by the meds (dyskinesia). But since there are no other symptoms in my viewing of her speech from a couple of days ago, I would guess the falls are from seizures. The sack of potatoes into the van looked like a seizure.
If it was a Parkinson dyskinesia event, she is likely somewhere around stage 3. Literature suggests managing meds is a work in progress at that stage. The busy campaign forced her to push the limits so some of the more severe symptoms popped up occasionally. Now that she is just making speeches, she can show up in public on her terms. It seems to me she is getting worse with all the recent falls and injuries.