### Steps to reproduce

1. Confirm current aggregation period in Admin settings

2. Modify something about a work Begin of the insertionpackage (anything besides the description)End of the insertion Begin of the deletion package End of the deletion

3. Within the aggregation period, add a comment and @ a Begin of the insertionuser.End of the insertion Begin of the deletion user. End of the deletion


### What is the buggy behavior?

* Mention'd user will not receive an email about the mention.

* Assuming this is because the actions (because of the aggregation settings) gets squashed into one activity and the mention gets forgotten Begin of the insertionabout.End of the insertion Begin of the deletion about. End of the deletion

* Even after the aggregation period, there is no email Begin of the insertionnotification.End of the insertion Begin of the deletion notification. End of the deletion


### What is the expected behavior?

1. Mention'd user should receive an email about the mention


### Environment information

_Please check and fill out the following details to help us identify in what versions and distributions of OpenProject the error occurs_

**OpenProject installation type**

* [x] Hosted cloud edition
* [ ] Packaged installation
* What distribution?

* [ ] Docker All-in-one container
* [ ] Docker-compose installation
* [ ] Other (please specify)

**OpenProject version**

_14.3.0_

**Browser**

* [x] Chrome
* [ ] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [x] Other (please specify): Edge

**Language**

_English_