Title with over 38 characters become twice the size

I have isolated this down to the simplest components and all my h2s that are over 38 characters, including spaces, are rendered at twice the defined style.

I have h2s with a class that gives them a font size of 25px when the title is less than or equal to 38 characters it render fine, when longer it is bigger. If I remove characters so that the title is less than 38 it renders correctly if I add it does not.

Any idea what is causing this as this is a deal breaker in that I must have consistent header sizes no matter what the character length.

Thanks