Contact groups created are by default expanding, Ideally it should collapse the groups.
Under Contacts section - When we create multiple groups and add people to those groups, all the groups are expanding by default when we refresh Teams app. Ideally it should be in collapse mode. (ie., It should show only groups names instead of showing group members also. If user want to expand and see any group, he should do that. but not the teams app by default. it's very irritating all times to shrink the groups.