other click event is firing twice

Scenario : CTA event (eventx) should be fired on every cta present on the website. 

It is happening correctly but it is firing two times sometimes. Below is the screenshot for network tab where first call showcase the parameters for analytics parameters.

In second call or duplicated call, there is one more attribute "sdid" getting generated in the payload. Is this Target paramater? 

Data Collection rules and event listeners are checked correctly , first call is only required that is event should be fired one time.  This scenario is quite intermittent , not always duplicate call is captured but what could be the probable reasons for it happen.

 Thanks in Advance.