so, while 5.1.4 whould be available for two days, no update appeared even when I checked for updates multiple times.
Even after reboot.
last time I reported repeated update of kernel packages:
I have denied those updates, maybe it caused that.
I also noticed the same bug as:
I found files in /usr/share/updater:
need_approval
approvals
…both created after last update check.
removing those two files and running update again allowed me to see and install 5.1.4.