Same here but I have no hope in MS after years of having to use some of their software or work with their server products.
I am using PWA (Chromium on Arch) as it is the path they are following and therefore have to accept the lost tray icon which shows new messages arrived or missed calls. Notifications are working though.
Even more annoying is not being able to have ringing on two sound channels at the same time (e.g. headset and laptop loudspeakers) as it was possible before.
We just have to accept that they take decisions based on commercial interests and not customer feedback / needs and we have to use products other than MS if we don't like it.