Multi-Select - Select Design


Is there a design reason for the difference in functionality between a related entity drop-down and a multi-select list?

A relation list lets you select multiple options without collapsing the related entity drop-down, but a multi-select requires you to click again every time you want to choose another option.

For my use case I like the “select as many as you want” approach and then click away to the next field, especially within forms. I was wondering though if this was intentional or if there is an option to request a change to it.