Yes, reading it again, I agree this bit really sticks out:
'But she doesn't seem to have interrogated her own position on this issue very thoroughly at all and looks increasingly confused when I try to.'
If she were a back bencher then I wouldn't find it so startling but, from a senior politician who, if Starmer were to fall (or be pushed) under the proverbial bus, could well end up as Prime Minister, it's not impressive.