Two USB-C monitors with 2016 13-inch MBP w/ 4 Thunderbolt 3 ports I have two USB-C monitors (specifically Dell P2219HC), and I am trying to connect to them both as separate external displays. I am using the included USB-C to USB-C cable for each monitor.

If I plug one in, in any of the 4 Thunderbolt ports, it connects to it just fine. If I plug the second one in, in any of the 3 remaining ports, it does not detect the monitor, and the monitor displays a message indicating that there is no USB-C signal from my device. And vice-versa. I am not sure why this is happening.

I am running macOS High Sierra 10.13.6, my graphics card is the "Intel Iris Graphics 550 1536 MB".
I have tried again today, and after plugging the monitors in and out, it works as expected now... I am not sure why this happened. Perhaps my macbook detected one of them as a display and the other as a charger instead of a display? I am not sure.