One other item – just upgrade to 9.0.0 for jq widgets and still have the same issue.
By the way, I was not using the event.stopPropagation() call but saw that as a possible solution in an old post. It did not make any difference.
Figured this out myself. Found the following article: https://stackoverflow.com/questions/18580389/svg-transparent-background-web
changed my style to
style: { fill: ‘none’, stroke: ‘none’ },
and now it works fine on all the browsers I tested (Edge, Chrome, Firefox, Safari (iPhone X), Silk (Kindle Fire 10)