Auto Animate control
Auto animate can sometimes give itself extra work sometimes. The items that swap position have the same vertical position on both artboards, same name, same hierarchy on the layers panel, and the exact same writing inside yet want to swap position then change text when animating.
I managed to solve the bug by randomly swapping the symbols in the layers panel on one of the artboards (So one art board has signup then no account whilst the other has no account then signup) but perhaps some tools to help the auto animate function similar to how PS has area mapping for content aware. Or maybe auto animate looks at the names of items and can relate them, or for increased functionality, you can "link" items in the layers panel, that auto animate uses and will search for the same name item in other artboards and will animate from the same name? It could create more complex animations and allow more accurate use.
Vertika Gupta commented
Please post this in feature Request :- https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests. All the new feature request you have to use the above link.