Launching Overwatch disables alt+tab

A very new and interesting bug I’ve seen since the latest patch. I alt+tab a lot, but for some reason after launching OW2, alt+tab is disabled unless I force-close explorer.exe and relaunch it… new cheat detection methods by hooking into explorer?

EDIT: I seemingly can not use the start menu either.

EDIT2: Can we get an ETA on this? It’s really affecting my productivity. Overwatch should not be locking my ability to alt+tab to another process…