Summary

At the moment, when using a "For-each" branch and an action under the branch to update a field or add a comment or send an email, each iteration is performed independently and hence the action is made multiple times, i.e:

a) Update a field: The field is updated on first "For-each" iteration. When updating the second iteration, the first update is overwritten. This way, the field will have only the last "For-each" iteration action value.
b) Comment on issue: We see multiple comments added to the issue. Same as the number of iterations from the "For-each" branch.
c) Send an email: Since we do not have the ability to store all updates at once, the same number of emails are sent out as the number of iterations of the "For-each"
 

Suggestion

It would be great if automation could provide an option to store all iteration values from an action under the "For-each" branch to a single field/comment/email.