Text Formatting Incorrectly – Desktop vs Mobile

Hi there

I have created a Google Web story where the titles look perfect in the editor dashboard and on mobile (android) however when viewing on desktop or on iphone the titles run over onto the next line and the formatting goes off. The plugin is the most up to date version and the text is within the design parameters.
See web story link attached (slide 3 in particular)

Any advice appreciated
Many thanks

The page I need help with: [log in to see the link]