I just noticed that validation error messages now seem to disappear after 1 second.
Is this a new feature? can it be increased to 2?
Is this in your app?
Nothing has changed so perhaps something in your app ( some action running etc ? )
Alternately if you can make an example page to reproduce we can have a look.
It’s a Wizard form that runs the onUtility hook on tab change.
So I assume when you click NEXT it validates, shows the message and runs the action calling the hook and then refreshes and removes the error message.
That sounds very probable.