New Guests users are not found in teams via DisplayName
A few days ago, any new Guest users cannot be found when searching for them in Teams.These are users that have been onboarded to AAD outside of Teams.
The only way to add them is to search by email in the search bar, then go to the Team, then the Guest is found.
Have logged a support ticket, but I got told it's by design.
This only started occurring a few days go, and now it's complex for a user to add a Guest to a team without knowing their email address (ie can't add by name until the cache? is populated by searching users by email address)