All my devices are vanilla.
Currently I use Chrome Version 73.0.3683.86 (Official Build) (64-bit)
Previously I used Safari Version 12.0.3 (14606.4.5)
Builds with both browsers have the same issue.
On MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports) with Mac Os Mojave version 10.14.3.
Thanks
Noel