UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Steps to reproduce the problem:
1. Open webmail that use base64 encoding
2. Print
3. Chrome print preview will load forever with a blank preview page

What is the expected behavior?
A preview page of the email to be print should be shown

What went wrong?
Chrome cannot decode base64 encoding in print preview

Did this work before? N/A 

Chrome version: 52.0.2743.116  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 22.0 r0

We are using Zimbra webmail