Cursor is placed left of selected mention in firefox

[wnm]

How can we reproduce this bug?

1. Go to https://zurb.github.io/tribute/example/ in firefox
2. In the first example, type "@" in input field
3. Select a user with hitting enter
4. The cursor will be placed left of the newly created html

What did you expect to happen? Cursor should be on the right

What happened instead? curser was placed left

Link (jsfiddle/plunkr/codepen) or Screenshot:

https://user-images.githubusercontent.com/705094/161021069-069c5380-e668-42bc-81b4-26d4b4f37b4e.mov