The team is working on changes to the desktop client so recently opened tabs are kept in memory, as long as it doesn’t use too much memory.
I will keep you posted as we make further progress.Ishwar commented
This is very annoying, disgusting and disturbing to work in team as you cannot open chat window and Teams folder window at the same time. And every time it close all file, subfolders when you switch to other tab in Teams. I see in this forum that this issue is reported to Microsoft long back and its surprising to see that they are not doing anything on it. Do anyone has latest update on this issue as what is Microsoft's feedback on this?