[DevExpress Support Team: CLONED FROM Q347182: TdxTabContainerDockSite - The last DockControl doesn't become active after closing the tab]
Hello Paulo, sorry for the delay. I would expect the OnActivate event to be fired each time when the tab gets active. Also, when another tab is closed and a remaining tab gets active indirectly.
Best regards , Michael
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
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I have reproduced this behavior with the attached sample project and forwarded this ticket to our developers for research.