The option to “discard” suggested contacts in your chat list is rolling out to users. We will be making further changes to make suggested contacts more relevant for new users in the future as well, so marking as partially completed. Thanks for your patience with this one.
~Alex & the Teams teamPaul Allard commented
This is very annoying feature and, for me at least, is just screen clutter.
Please provide the option to remove it or have it default (and stay!) collapsed.