[i336_]

(Not ebang4)

That's interesting; sounds like a very similar issue to this one (with Link Prefetching). That said, Edgar is from OneDrive, whereas you're talking about Office365. My guess is that the departments are "just far apart/different enough," so to speak, even though the issue does sound the same.

I really liked to hear that "We will definitely ensure that more Linux testing is done!"; hopefully this is a collective mindset (and I really do hope that, non-skeptically). Maybe if you're persistent now you might get somewhere - although it could take a while; the L1 techs on the forums or wherever are probably not completely tuned into these recent developments.

You could also try being unorthodox, such as for example politely poking random people on GitHub/microsoft (fish emails out of local repo clones :P) - that might find you someone who can figure out a good next hop in the direction of the right department, eg someone might be able to pass your email on to some developer directly. That's always really cool.