I have the plugable USB 3.0 docking station. The monitor that is plugged into it via HDMI stops displaying if the laptop goes to sleep or first boots up. Unplugging/replugging the docking station USB to the laptop resolves the issue, but it’s still quite annoying. Note that other docked peripherals work fine after reboot/sleep (mouse, keyboard, speakers).
I believe this problem began after I installed DisplayLink version 8.2.1638.0. This was an attempt to fix a different problem, where the entire thing would apparently crash briefly while playing video games.