Hello, I have problem with mouse lags on MBP 2018 with external display. I use now Yiiama 5K 27" display, but it also occured with old Dell 4K display. I used USB-C <-> DisplayPort cable to connect monitor, resolution, rehresh rate etc. - everything is ok. But sometimes, especially after night or some inactivity (computer sleeps), there are a mouse lags on display - everything is ok, but about every 4-6 seconds there is small lag, and then again ok... again lag etc. It's not only on mouse, I can also use touchpad to for example, make "circles" on display, and there is the same problem. Solution is to disconnect external display for few seconds (10-15), then connect again - lag disappear. Of course I can also reboot Mac, but it's stupid. Do anyone know other, permanent solution for such issue?