How come my text does not show up correctly when I look at it on my phone?

When I format my text on mobile and save it, it works. However, when I go to check at the mobile version on my phone, my saved text is not as it appears. Sometimes a word is combined together, and other times the header has a word or two hanging onto a second line. I thought maybe it was because I was copying and pasting from Photoshop onto the slide, but after retyping it word by word, it still does the same thing. Please help! I’m not sure how to fix this…