Email Opened - not tracking
Hi All,
We sent an email where there are 2 links to external web pages. We have opened the email and clicked on the links.
We cannot see any results for the Email Opened trigger, instead we have the results for the Email Clicked trigger. So we are able to track the clicks on the email but we don’t have results for the email opened.

We had the same triggers in other previous campaigns and in that case they worked in a proper way. Do you know what can be the reason?
Thank you in advance
Daniela