This is very common if you're the type that uses a mobile phone to log in to the forum, in most cases you have to zoom out to be able to see the text characters, those uses to the computer or desktop version may not have this kind of stuff experience but am very sure that the smart phone user's were already used to zooming in and out while making a reply on the forum comment section, I don't think it's a new development or change that was just implemented.