The BC standard demo shows the same problem! The structure of the menu differs depending on how the "Customer List" is called up. Because it's the exact same page, personalization can't fix this.
It's not a problem with our environment, it's a problem with standard BC behavior.
You can reproduce this yourself with the Standard-BC-Demo:
Call 1 (= not desired display):

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Call 2 - over the Explore-Menu (= desired display):

You should then see the difference for yourself.
greeting
Ralf