I am using the newest MST hub (1-3 DP) with a Surface 3. It is driving three Dell u2514 monitors (1920×1200 each). This is right at the limit of what the Surface 3 supports. (So close to that limit, the built in MST chaining on the monitors did not work).
I have noticed on one of the monitors, it will periodically flicker off and back on. It is just a second. Almost like it loses video.
There is no pattern to it, but was curious if anyone had any suggestions.