Errors after upgrading from 4.3.0 to 4.3.1

I upgraded this gem from 4.3.0 to 4.3.1. Now when running my tests I am getting errors logged such as:

jQuery.Deferred exception: null is not an object (evaluating 'createdDocument.body') sanitizeHtml@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:15965:49
_getConfig@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:16578:39
Tooltip@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:16107:36
http://localhost:41065/assets/application-7de341d...8b5bd36839.js:16643:29
each@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:355:23
each@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:190:21
_jQueryInterface@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:16633:23
http://localhost:41065/assets/application-7de341d...8b5bd36839.js:66417:41
mightThrow@http://localhost:41065/assets/application-7de341d...8b5bd36839.js:3535:34
http://localhost:41065/assets/application-7de341d...8b5bd36839.js:3603:22 undefined

These errors happen when running rspec using capybara and during a visit command to visit a page.

All the tests seem to be passing, but I am trying to figure out what is causing these errors being logged to the console as the tests are running.

Start by reproducing the error in the RSpec/Capybara test flow at the visit call, comparing gem versions 4.3.0 and 4.3.1. Use the provided JavaScript stack trace, including Tooltip and sanitizeHtml, to trace the regression; done means identifying why the console errors appear and confirming the test run no longer logs them.