Dear Ian,
We tested your case using the latest versions of Types and Views along with Download manager. Based on our test, we are not able to replicate the issue and looks resolved. We are using the Types single line custom field to store the Download manager shortcode. And we use that custom field inside the View. In the front end we checked on it and the link seems working. Please see all related screenshots on this test.
We just sent the latest plugin versions to your email for further testing. Please confirm if the issue is now resolved in your end. Thanks.
Cheers,
Emerson