I had the firstboot and the reconfiguration 3 days ago and there was no IO freeze for me since then. Neither on the ASUS TUF-AX4200 nor on the Linksys EA8300. Maybe it is too early to be 100% sure, 3 days uptime is not that much when usually I got the IO freeze in 1-2 days, but in my case it is highly likely that the package upgrade caused the issue. Right now opkg list-upgradable shows the following list:
luci-theme-bootstrap - git-23.306.39416-c86c256 - git-23.338.81541-94798fc
netifd - 2023-11-10-35facc83-1.1 - 2024-01-04-c18cc79d-1
luci-mod-status - git-23.306.52197-bdcd3e0 - git-23.351.85404-a962261
luci-app-firewall - git-23.306.38853-a0466cd - git-24.008.46353-971459d
luci-base - git-23.306.39416-c86c256 - git-24.006.68745-9128656
luci-proto-ipv6 - git-21.148.48881-79947af - git-23.355.78874-80140aa
luci-app-upnp - git-22.297.83017-2877753 - git-24.025.85485-89a9b58
luci-mod-network - git-23.313.56166-6da284d - git-24.025.85485-c30d85b
jsonfilter - 2018-02-04-c7e938d6-1 - 2024-01-23-594cfa86-1
So one or more of these are not recommended for upgrade. I guess the luci packages are for the web interface, the jsonfilter is quite new, so that netifd package is what I would consider, but this is just a guess, I have no proof.