In commit ec9dc73 restarting NetworkManager after resume from
suspend/hibernate was introduced.
When I initially switch to NixOS I started noticing a high delay between
wakeup and re-connecting to WiFi & wired networks. The delay increased
from a few seconds (on my previous distro, same software stack) to
almost half a minute with NixOS.
I (locally) applied the change in this commit a few weeks ago and tested
since then. The notebook/mobile device experience has improved a lot.
Reconnects are as before switching to NixOS.
Issue #24401 could be related to this. Since I am not using KDE/plasma5
I can only guess…