Hi skcalanerson,
We have a bug in for this active since UE4.11 (UE-27525) reporting flickering, but only if the nVidea Card is inactive and the Intel card active… Can you verify that the nVidea Card is active when you are experiencing this bug?’
You can set this by opening Energy Saver and, at the top, uncheck Automatic Graphic Switching which will leave your nVidea Card open at all times. (You can switch back after testing.) It is expected this will resolve the flickering -In which case, this is the same bug that has already been reported.
Set graphics performance on MacBook Pro
-Let me know if this temporarily resolves the issue.
Thanks,
.