Hi @Inlesco, welcome to our Community Forum 
It looks like the member that shows up on your task has not been fully removed from your organization correctly.
You may have removed them from a team (in a free organization) but did not remove them from the organization itself. If that’s the case, they may not show in any teams but will still appear in the typeahead when you’re assigning tasks.
Please follow these instructions to fully remove this person:
- Access any team’s settings from the sidebar
- Navigate to the Members tab
- Invite the person you want to remove
- Immediately after inviting, find their name in the Members list, and use your mouse to hover over their name
- Click Remove
- Then, click Remove Access
- Finally, click Deprovision
You must click all 3. The second click removes the person from the team, and the third click completely removes them from your organization. For a visual demonstration, please have a look at the GIF in this article.
Hope you find this information helpful 