For some reason users are getting the following popup/error when toggling 'Quick Edit' on a list or library.
This site says...
Assertion Failed: Edit manager is still in Editing state, but focus is on the grid's input element!
Break into debugger?
No errors are showing in Chrome's developer tools console. However it is showing the following messages... (I'm not sure if they are related.)
[Violation] Added synchronous DOM mutation listener to a 'DOMSubtreeModified' event. Consider using MutationObserver to make the page more responsive.
[Violation] 'click' handler took 34811ms
We are running SharePoint 2013