Respondents who open "all links" in an email

Every month we send out several segemented client newsletter digest featuring links to new financial education content on our website. When the email is sent, I export all of the "clicks" to see which links were clicked and who clicked them. It's a crucial way for us to find out which topics our clients and prospects may be interested in. 

Usually with every email there are one or two people of each list who seemingly click on every link, including our social media links. I usually throw those out because I theorize that something in their email system is tagging every link as being "clicked." 

With our last set of newsletters, sent out on Friday, May 17, at least 10-15 recipients on each list "clicked on every single link." This is much higher than average. I'm wondering if there's something weird in the email itself that is causing these "click everything" results? Note that these results are happening on a variety of email addresses, from gmail to corporate email addresses. None of these emails were blocked or tagged as spam.