Weird screen blanking issue

I have a somewhat involved office setup, that looks something like this: My 2021 MacBook Pro 14" is connected to a: → Cable Matters USB C Hub DisplayPort 100W, 4K@240Hz (USB C DisplayPort 1.4 Hub), 480Mbps Ethernet, 2X USB , which in turn is connected via a: → IVANKY 3ft/1m DisplayPort Cable, DP to DP 3.3ft, 4K@60Hz, 2K@165Hz, 2K@144Hz DisplayPort cable to a: → Unitek DP KVM Switch 1 Monitor 2 Computers USB 3.0 8K@60Hz KVM unit, which uses another: → IVANKY 3ft/1m DisplayPort Cable, DP to DP 3.3ft, 4K@60Hz, 2K@165Hz, 2K@144Hz DisplayPort cable to a: → Dell UltraSharp U2412M 24-Inch Screen LED-Lit Monitor The 2012 Mac Mini (OCLP patched and running Sequoia) is connected via a Cable Matters 4K Mini DisplayPort to DisplayPort Cable , to the KVM, and through the KVM to the Dell. It works perfectly. The MacBook Pro keeps blanking the screen, for ~...