On slides.google.com, if a context menu is popped up via longpress on a text object, it can't be dismissed by tapping elsewhere in the slide canvas. Steps to reproduce: 0) Install iOS 13 beta or newer on a non-mini iPad (no hardware keyboard attached) 1) Visit https://slides.google.com/ and log in with a Google account (if not already logged in) 2) Create a new presentation using the orange 'Your big idea' presentation template. 3) Make sure the selection and focus is on the filmstrip and no shapes are selected on the canvas. 4) Long press on the word 'Making' to bring up the context menu. 5) Tap outside of the context menu on the canvas to dismiss it. Results: The context menu does not dismiss. In fact it's rather tricky to figure out how to get it to dismiss. Selecting another slide seems to do the trick.
<rdar://problem/53650423>
This happens even whether hardware keyboard is attached or not.
Created attachment 376193 [details] Patch
Committed r248662: <https://trac.webkit.org/changeset/248662>