Current Problem
Assignee badges located on an active board can become cumbersome to scroll through if there is a large team using one board. Currently, I am able to type in a name of a user and the issues in the board filter for anyone assigned (which is good).

The unfortunate issue is that the assignee pick next to the board search text box does not filter also, so imagine if I had 100 assignees in one board, I type in "chris", and 20 chris' assigned to issues in the board are filtered. The problem I have is that I know what his profile icon looks like but not his last name or what he is working on.

Suggestion
My suggestion would be to filter the assignee icons at the same time as when a user is typing into the board search text box.