Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hi neilgreenaway,
Thank you for choosing Microsoft community.
Regarding your concern, I tested from my Teams for Education account. By check, both the Grid and List layout remain still. You may further check by opening an inprivate browser window and going to Teams Web app (https://teams.microsoft.com/) to avoid any cache issue. See Browse InPrivate in Microsoft Edge.
Grid Layout
List Layout
Hope it helps! If any update, welcome to share with us.
Thanks & Stay safe,
Qian