I found a Blackguard base that was too strong for me. So I let my tribe to destroy it. After that, I press the "Go Back" button that phones back and the game reloaded the map of the base that got destroyed from the tribe. That should not be the case. It should load tbe map of your Main Base instead of the destroyed one.
Also fun fact: after the destroyed base's map loaded, I press Attack to conquered the already destroyed base. It could not find any match.