Scheduled report PDFs unreadable on phone

The 'fund activity' report pdf is unreadable when opening on outlook on phones, with the top of the report showing fine, but the actual lines of data squiggly and strange. They almost look like they've been encoded and made intentionally unreadable... When opened on the computer however the exact same PDFs are perfectly readable and the text shows normally. Has anybody else run into this glitch with report pdfs and if so have you found any solutions, work arounds, or explanations?