Workflow Step Properties do not accept special characters

I am trying to add a property to a workflow step in order to restrict permissions at that step, however, i tried adding a group which has an "&" in it which is an allowed character in AD which the group is synced from as well as an allowed character in Jira for group names, but it gives me an Invalid Character error and won't allow me to enter that value. This keeps me from setting correct permissions for my workflow steps.

See screenshot.

Please help.