Cutoff in the number of emails which can be included in a conversation

Hi,
We are organising events where scientists visit highschools to discuss with students. Scientists register through a form where they choose their events, their answers are sent to the “Registration” table.
We then have a an “event” table, where we have plenty of data on each event, and one of the several columns linked to the registration table gives the emails of the registered people.
We have automations sending a group email to all registered scientists for one given event when a column is checked, to send for example emails saying “your event in the highschool is in two weeks” or “here are the final details for your event”.
We just noticed that if there are more than 10 emails (thus for us more than 10 scientists registered for the event), the email is sent (the automation doesn’t refuse to run", it just “forgets” the additionnal emails.
Is this a known/on purpose limitation?
Is there a way to go around this?
This seems like a very low bar for a group email. We very often have 10 to 15 scientists signed to go meet highschool students in one event (the number of scientists will be set up by the number of students : we count one scientist per 5 students in order to be able to run a speed meeting).
Thanks a lot for any insights.

(I should mention this is not just single emails we want to send to each of the registered people, we need a group email to put them all in touch with one another and the teacher and the “Captain” of the group)

This seems like it is the automation limit, which is I believe 50 data fields per minute. So, if 10 emails are send, and they contain more than 5 automations fields than it will not work.

thank you very much Soonimproveduser, what do you call exactly automation field? If those are for example what I highlighted in blue (I did not highlight all of them), there are more than 5 so it is not the issue…

SeaTable can only manipulate 50 columns at once, as far as I know and believe. when you have one column per row than you can update 50 rows at once, when you have 2 columns per row, it is only 25.

thank you for taking the time. I am a bit lost though, we have over 450 columns in the Event table, which is the one used in the automation. The email sent by the automation has 17 fields in the linked to 17 columns of the table…