Macbook takes 20 seconds to wake up

Kubuntu 20.04 on Macbook Air suspends fine but takes too much time to wake up each time, about 20 seconds.

It seems to be a case of normal suspend/ sleep, not hibernation, given systemctl suspend triggers the same behavior.

running that, waking and then running

journalctl -b --since "1min ago"

I get this (on Pastebin). there is no hibernation mentioned there.

As for memory and swap, I think there is enough RAM:

~$ free -h               total        used        free      shared  buff/cache   availableMem:           3,8Gi       703Mi       1,7Gi       162Mi       1,4Gi       2,7GiSwap:          2,0Gi       440Mi       1,6Gi