Why does outlook hang waiting for javascript to run in Edge?

I'm running a linux workstation, fedora. I'm using Edge Version 122.0.2353.0 (Official build) dev (64-bit)

I can't access the outlook web access, available here: https://outlook.office.com/

The page will respond, load initially but after about 30 seconds, it will stop responding to clicks and other user generated events.

Soon, I'll get the "This page is not responding ... Exit Page | Wait" that comes up when javascript is spinning hard and blocking the thread.

I had used Outlook as a PWA for a while, maybe since November of last year but I think starting January it's started doing this.

I first noticed it after coming back from work and outlook just wasn't responding then showed the popup.

Things I've tried:

* Submitting feedback via the "submit feedback" function in the help menu'

* Clearing all storage, cache, cookies

* Deleting the service workers tied to the application

It works properly in Firefox... haven't tried Chrome.

ALSO, it seems that "linux" isn't shown as an option under "Operating System" -- I've selected "Android" as it seems the closest.