This does not occur when using link type of "http" or "https"
When using the link picker to add links of this type, use the "https" type of link.
Steps to Duplicate
1. From BBIS navigate to Email>Messages. 2. Create or use an existing Message. 3. Insert a link>Create Other Type of Link>Use a URL with an ampersand>Insert. 4. Note the ampersand was replaced with amp.