Halo MCC stuck on syncing data on Streaming Preview

It did start a couple of days ago! Noticed it playing Diablo III but also still waiting for some Halo MCC achievements to sync. They are stuck at unlocking!

I'm not a part of the preview program and I've reinstalled my games but none of the save data synced. So I'm stuck at the beginning of red dead redemption 2. Thanks for the idea though

It should sync automatically to the cloud while I'm play, right? Then, all the other console has to do is update it's data by importing it from the cloud during the syncing process. For some reason, it doesn't do that. For example, I can play on both consoles
with Halo 5 and MCC and all the data syncs. (I can mess around with Forge in MCC or H5 OR I can play the campaign on one console and the pick up where I left off an hour later on the other.) However, when I jump on to Forza and run a few races or just drive
around in the game, what ever progress I make doesn't sync (or if it does, it doesn't sync on the other console because of a glitch or something).

According to my achievement progress, The Silent Cartographer has now reverted back to "locked" despite the fact I completed the Halo CE campaign on heroic and got the achievement to prove it. I'm hoping the fact that The Halo Channel app is down, the website
too and the MCC collection being unable to sync data is all related.

I'm still having issues as well. On Monday I couldn't load MCC. I tried a hard reset on my console as well as power cycling it with my modem and router but no dice. It still froze every time I pressed start on the title screen. Now none of my games will
load.

I decided to reinstall MCC but now I'm stuck with a ponderously slow install time and nothing to do. Is this because I can't properly sync my save data?