I have created a marketing automation campaign for leads/opportunities.

In the campaign, I added a activity to send an email based on the filters.

With the scheduled action "sync participants" it picks the participant based on the filter

When the scheduled action "execute activity" runs, the activity gets cancelled and the participant is marked as "removed".

If the same activity is set to run with a domain on "mailing lists", then it works correctly.

Did anyone face this issue? Is there something that I am missing related to leads/opportunities