Recently upgraded to a PS5 from a PS4 Pro, which is connected to the monitor via HDMI, and I have my PC connected via DP. Now If my PC is already turned on, when I turn my PS5 on the monitor doesn't detect the signal, I switch source to HDMI and it just goes straight back to DP. I have to turn off the PC completely to get the PS5 to come on the monitor. After that I can turn the PC back on and the monitor switches between the two fine. Alternatively I can remove the DP cable from PC or monitor but both ends are a tough reach to get to. I never had this issue on PS4 Pro or PS4 before that. Monitor is a bit of an off brand, Electriq 27" QHD.