MC182488 announced the change to All plans back in June 2019, and that going forward it would not be showing groups that did not already contain plans. We have had a few support calls coming in wher...
Updated Aug 19, 2019
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Thanks Brian-Smith for the clarification. That explains why I thought that a plan was created automatically when a Team is created.
But I'm still a bit confused. As you see in the screen clip below (sorry it's in Swedish) I created a Team with the name "A_a"
I open the Planner hub and I can't find the Group "A_a" under "All plans" any longer (but I did in June). But if i have no "Favotite plans" and no "Latest plans" I get a dropdown "More plans" and my Group/plan appears in that listing (se below). And if I try to click on it i get the message "This plan is missing or has been removed. Would you like to remove it from favorites and recent plans?" And if I try to remove it nothing happens
So from your description of the Changes you have done I guess that under "More plans" you are still listing Groups not actual plans.