The robot first fetches the list of email via the GetAllMailIDsArray action from OutlookV2 metabot.
Then the robot has to loop over each mail and one of the first actions done on the mail is the SelectMailItem action from metabot OutlookV2.
We see that this action works for the first email from the list, but fails for all other emails from the list.
This issue is not consistent and doesn't happen all the time, but it does happen more than we want to.