Viva Goals + Planner Integration - Planners don't show up.

Hello,
I am using Viva Goals to track our OKRs, we also use the planner integration to have better tracking. 
But we have problems connecting viva goals to the planner. It's a little bit random: In the window where you chose your planner the ones I want don't show up. Some did in the past and vanished later. But I can see other planners as well, even new ones.

Some of my coworkers have the problems, others not. The permissions on teams, planner, and viva goals are all set to "Owner". On the ones that vanished from selection we didn't change anything. We also tried to remove someone from the team and then added again. Or a planner without a team and viva goals.

Does somebody has an idea how to fix it?


Best,
Erik