I find myself in a similar situation.
I have 5 nodes (Intel NUC8i7HNK and HVK) and each of them is connected into a HDMI KVM (AIMOS HDMI KVM 8 port)
In 7.4-3, when switching between them, everything went smooth, I have video signal and getting the console.
Since migration to 8.0-3 this is no...