At "task" element, if a participant submitted a file or did something else at that course element, neither the lecturer nor the participant gets an email, despite "modification" switch is turned on.
except after assigning a task, participants get an information about success.
It would be better, if participants at one hand were informed about a received feedback etc. and at the other hand lectures get an email about e.g a submission.
Therefor the eMail content should be more informative, as actually the above-mentioned "assigning task" email contents no hint about which course, which task, etc., but “Assignment was successful“.