OPNsense is great, but at the moment unfortunately publishing of updates is faster than quality management. With 19.1.5 there had to be applied a hotfix (save plugin config) and several patches (WOL, DynDNS, php7 related stuff, ipsec).
It's getting really hard/complex to maintain a production cluster without daily tracking this forum and noting down all necessary patches that have to be applied in next maintenance window, when doing an update.