Unwanted hyphens when converting to Kindle KDP

Hello. I’m exporting my book as a .mobi file. Looks great when previewing on my Kindle devices (via send to Kindle email address); however, when I publish on the Amazon KDP website their file conversion adds hyphens to the text (even on the title page.)

Any idea how I can prevent this from happening? I’d like to remove all automatic hyphens in this book.

Thanks!