Hi Saguaros
Thanks, I've tried 2 computers with Chrome, Safari and Edge. With Chrome I tried in incognito mode just in case.
In all cases the content from the second tab loaded first.
Try clicking on Mission on your demo, then click Vision .. then the content from the Vision tab will load.
I've just tried on my phone too, same results.
In your demo the contents of the tabs Mission/Success/History are the same, but Vision is using different words.
Did a screen recording too -https://www.dropbox.com/s/tyn956lsfcbbg5y/joomlart-demo-tabs.mov?dl=0