michalblazek

WordPress update seems to be basic stuff. You just click Update now and that’s all. Unfortunately we have seen countless WordPress errors after various updates or rutine changes.
These are usually caused by using some deprecated codes or not compatible plugins. Sometimes there may be some issue with a server memory, PHP or database. We have recently started to use the checklist for WordPress core, plugins or themes update. 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/dDFcckjcWFk?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

WP Update Checklist

Checklist for WordPress core, plugin updates and themes updates. What should your developer always check.

Eric Mann

DGXPCO (Digital Guarantees for eXplicitly Permitted Core Operations) is a proof-of-concept cryptographic signature verification utility for WordPress software updates. The plugin will source manual (offline) signatures for WordPress core updates and prevent the application from updating unless the contents of the update payload are verified with a remote signature.
This provides a second source of truth for the integrity of WordPress updates beyond the MD5 content hash supplied in the header from the WordPress update server. If that server were ever breached, it’s unlikely the server hosting the signatures of the files was also breached. If the signatures ever fail to validate, you can know your site was protected from an attack.

WP Update Checklist vs DGXPCO