Maybe "Suggested" menu in "Chat" tab should remember its position (open/closed). Currently when a user closes this menu, changing tabs then moving back to "Chats" tabs "Suggested" menu is open again. "Recent" tab is a good example how it should work.
This 'suggested' menu is completely useless, would be good if there was an option to remove it altogether. My list contains no-one I know or deal with.
Sean Ellis commented
All tabs, channels, chats etc. should retain their state when switching away to another view, and preferably between invocations of Teams.