99% Invisible doesn't work in some Mazda cars. The person who wrote the code could only say that the % sign had some meaning in the URL and that caused the "hea

99% Invisible doesn't work in some Mazda cars. The person who wrote the code could only say that the % sign had some meaning in the URL and that caused the "heartbeat" to tell the car that something wasn't working and therefore to restart. But no understanding of why this happens to % I and not % with other letters. Even % i -- the lowercase -- is fine.