Hello. We have run into an issue while updating jquery UI from 1.10.4 to 1.12.1 to fix some security vulnerabilities found during penetration testing of our client facing website.
1.11.4 and 1.12.1 both have the issue. 1.10.4 does not have the issue. This issue does not happen in latest IE, Firefox or Edge browsers. Only Chrome.
Unfortunately I cannot include a test case in jsfiddle/jsbin right now due to the complexity of the issue and complexity of our website. Will try to allocate time in the future to add one if necessary.