Galaxy S7 - Displays different text files differently

I uploaded several text (.txt) files to my Galaxy S7. When I access those files via Apps > Samsung > My Files > Documents, some appear as they should, easy to read, and others with text so small they are impossible to read without expanding the size with my fingers. I've looked at the files on my computer and can't see any difference. Any ideas of what's going on here?

Do the files with small text include really long lines that don't have a carriage return? If so, it might be auto-scaling the text in order to fit all the text on one page.

Both the "good" and "bad" text files have long lines that wrap in any viewer on my computer. On the phone, both "types" of files also wrap at the end of long lines.