In performing the upgrade from 4.5.2 to 4.5.3, a single row used by a plugin is deleted which contains all the data for the plugin. I'm digging through the upgrade and I don't see anything that relates to database changes, especially related to the
wp_options table structure which is the same before and after the upgrade.
db_version is the same in
wp_options pre and post update.
Restoring the row is possible and everything works fine, but I'm concerned it would happen again.
It is a custom plugin. Source code is not public. I am the developer of it, so I can fix problems.
Does anyone have any idea what could cause this and how to fix it?