Something like this happened to me in Scotland a few years ago: a rental car which read a roadsign for a 20MPH limit and missed the end of restriction sign, which meant I could not accelerate until I stopped and Googled how to switch it off.

All good until on the 60 mph A40 approach to Glangrwyney it sees the “30 mph in 200 llath (yards) ” sign and immediately brakes hard down to 30 mph which is not what I was expecting nor wanted. Lucky there was nobody behind. And we will never use that feature again -not in Cymru anyway.

https://hachyderm.io/@stevel/111312042288511501