This could be the cause: https://bugs.webkit.org/show_bug.cgi?id=82496 (found via https://bugs.launchpad.net/ubuntu/+source/webkit/+bug/952216)
This could be the cause: https:/ /bugs.webkit. org/show_ bug.cgi? id=82496 (found via https:/ /bugs.launchpad .net/ubuntu/ +source/ webkit/ +bug/952216)