In my case, updating a driver seems to have fixed the problem.

Intel(R) Management Engine Components Installer Driver
Chipset_Driver_KFR45_WN32_11.0.0.1153_A00.EXE

In my case, my screen was flickering almost every time I brought the XPS13 out of sleep. After updating this driver (the only driver Dell found needed updating), the laptop has experienced no screen flickering.