Fixed,
Got a 13" Macbook Pro Touch Early 2016
I was using a targus dock before, no displaylink driver required, plug and play
after updating no more external monitors
so i went to display link drivers and install it
https://www.displaylink.com/downloads/file?id=1715
Now is not automatic it requires "DisplayLink Manager" to run 2 external displays.... close the app... monitors stop working
but... at least now i can use 2 external monitors
works on all ports, left/right
using a dock is the problem, tried with a Sabrent thunderbolt to hdmi... works fine... no drivers required.
Pretty sure is a DisplayLink compatibility issue