Adobe Echosign Links not saving in Rich Text Fields?

Adobe Echosign Links not saving in Rich Text Fields?

Normally the URL that is inserted as a link in a rich text field works fine; i.e. they can be inserted, they save during update and are available in the rich text.

However, Adobe echosign links sometimes fail. They get inserted fine, but on updating the field the link gets converted to straight text and only the description text remains.I tried converting the dash and underscore characters per other threads but did not work.

Is there a known issue with echosign links in Creator?

Link Example working:

Link Example not working:
https://proformapartners.na1.echosign.com/public/esignWidget?wid=CBFCIBAA3AAABLblqZhBYzg3Se-SsyySt8IePv2Ws54vVrD8mvoKZB-xV8TA7RBJsTsFyo8q3jI_bgPk1YxY*