After upgrading to 64-bit 184.108.40.206.3621 version of Intel HD graphics drivers I have noticed you cannot output to 3 monitors (notebook display, 2 external displays)
Reverting to 220.127.116.11.3496 resolves the issue.
Seems to be resolved in 18.104.22.16852b
Thanks for the feedback. It is good to hear is working now.