MacMini 2018 is slow to wake after sleep

I have Mac mini 2018 with Mojave 10.14.3 and external display LG 27UK600 connected via hdmi 2.0 cable. When i put my mac to sleep, then wake it after 5 minutes, it takes like 60 seconds to wake it up. When i press any key on the keyboard monitor is kinda wakes up, but then goes black again, only after this it actually wakes up, but mac itself is awaken very quick.

What might be a culprit here?

Solution 1:

The problem was on MM's hdmi port, i switched to usb-c > DP and no more issues. Though it takes like 5 seconds to show up the picture, but it's acceptable, it's not 60 seconds.

I have no idea if Apple gonna fix this soon. But i have no purpose to use HDMI at all.

Solution 2:

I have a Mac Mini 2018 I bought early 2020. Initially I had the slow wake problem but when I upgraded from a generic wired mouse to Bluetooth Apple magic mouse that problem went away and has not returned. I just tap the keyboard and within a few seconds it's back.