Text displaying different in versions of iPhone

Hi, We have just noticed that the text in the same page is been displayed in different way (either size or position), please take a look at this two images, the one that displays correctly the title “Production Process” is in iPhone 6, the one that the title “Production Process” is cut (at the N) is iPhone 8.

We would like to ask for your support about this issue and what can be done in order to solve it for good?