Remote Play button missing from Windows Xbox app

I've used remote play on my Windows laptop through the Xbox app since I got my Series X and all has been fine, but today, I launched the Xbox app and the buttons was missing entirely from where it usually appears, between my profile name and the notifications button. I can still use remote play without issues on my phone with the mobile Xbox app.

I searched online and found some people saying that a reset of their console fixed this, so I went ahead and did a full reset (with "keep games and apps" selected), then went ahead an set up remote play on the console again, also restarting the console after making these changes. But this didn't make any difference to the problem.

I then went to the live support which puts you in touch with a gamer in the community and was advised to use ipconfig to release and renew my IP, as well as doing a DNS flush and a disk cleanup, after which the problem persisted.

They then told me to put either my console or PC into the DMZ on my network *and* forward the following ports:

88 UDP
3074 UPD & TCP (UDP was already being forwarded by uPnP)
53 UPD & TCP
80 TCP
500 UDP
3544 UDP
4500 UDP

I did question why it would be necessary to place a device in the DMZ *and* forward ports, which they told me "this is what Microsoft recommend". I also questioned the fact that they said it didn't matter whether it was my console or PC which I placed into the DMZ and forwarded these ports to, as that seemed odd.

In any case, it still hasn't resolved the issue and they finally said that they think there are other people experiencing this same issue, so I'm here now asking if anyone else is having this problem and whether you've been able to resolve it, or if MS are working on a fix for it?

:)