I am using USB-C docking station (Dell WD-19) with HP notebook. I've connect 2 monitors to that station - 1st over DisplayPort and 2nd over HDMI. Basically everything works fine, but in the 4K monitor (HDMI) I cannot set the resolution higher than 1920x1080, while on the 1st monitor, I can set max resolution (3440x1440).
Does anyone idea what can be wrong? Is there some limitation over the USB-C? I've tried to update the GPU drivers but it didn't help.