Teams not updating members

[ITGURU]

We are using the csv files and Microsoft SDS to create the 365 groups/automatic teams creation. This all works fine for new groups etc

However, if a student changes classes (removed from one group), the csv files are uploaded, the student is removed from the class/group in Office 365 Admin, and is removed from the 'team' members when look in the team Admin section.

However when the user logs into teams (web or desktop client) they still see the team and being part of the list of member.

The changes were made 4 hours ago and user appears to still be part of the team.

Not sure why when everywhere is showing the user removed from the group/team the client is not showing these changes?

can anyone advise?

Thanks in advance

[ITGURU]

Seems to be after 6 hours later it's finally gone after logging in again (was there), logged out and back in and gone!