Wifi random disconnects after update

This could be power saving issue which is one of the usual causes (though rfkill is not typical for that), try this (this worked for me in number of cases, or helped)…

To turn off powersave for network/wifi:

sudo vim /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
[connection]
wifi.powersave = 2

…‘2’ means ‘disable’ powersave

Also check here for an alternative Network is unavailable after sleep - #18 by brahma

But also very good catch by cscs, try that first.