Thanks for the response!
I am working with Tables, Clustered Column Charts, Matrix, Text Boxes, images, and Line Charts.
The reports that contain these are all pined live to my dashboard.
There is no consistency in which reports fail when the subscription of the dashboard is sent. However, after reading one of your articles you shared it sounds like Dashboards with over 25 pinned tiles, or 4 pinned live report pages, may not render fully in subscription e-mails sent to users. My issue is that I have 15 reports pinned live to my Dashboard. If this limit is could be extended it would be a good benefit.
After reading threads like the one below - it sounds like PDF's from subscription will be available at some point in the future.
https://powerbi.microsoft.com/en-us/blog/e-mail-subscription-time-based-scheduling-now-available/
Thank you for the help and insight!
Cheers
Mike