Links in meeting invite emails not working in GMail web interface

Links in meeting invite emails not working in GMail web interface

When a GMail user opens a Zoho Meeting invite email in the GMail web interface the links in the email don't work (not clickable) and there is a strange looking gray background in the email body.  If the GMail user forwards the same email to their same GMail account and opens the forwarded email, then the forwarded email works properly and does not have the gray background.  We've tested with Yahoo and Hotmail web interfaces and they do not have this problem.  Native email clients also work fine.