Thanks for following up @JamesTedrick .
We are not encoding the link for users, but the redirect (as shown in the attached image) is encoding the @ character as %40. An example of our original link is: https:://survey123.arcgis.com/share/437eac8e2d174d0a94a05629bc7b3358?open=menu&field:Email_Address=amesser@mt.gov
The encoded redirect is: https%3A%2F%2Fsurvey123.arcgis.com%2Fshare%2F437eac8e2d174d0a94a05629bc7b3358%3Ffield%3AEmail_Address%3amesser%40mt.gov
We tested encoding the @ symbol when troubleshooting and it did not solve the issue. For example we tried: "https:://survey123.arcgis.com/share/437eac8e2d174d0a94a05629bc7b3358?open=menu&field:Email_Address=amesser%40mt.gov" . We also tried encoding everything after the ? for our full url with all questions. The only thing that worked was getting rid of all @ and all %40 references or ensuring the user had authenticated to survey123.arcgis.com.