Root Cause: The array was not correct if it contained a large number of entries (total size of entries including variable name > 65 KByte). In this case wrong variable names have been stored as well as it could cause WP crash.
Update to a fix version listed below or a newer version if available.
Fix Status: Released
Automation.Engine 12.0.0 - Available
Automation.Engine 11.2.3 - Available