It only shows Drive (for each account), Bug Reports (?) and System Traces (?). Of course, I just restarted my phone to see if it fixed it. It did, but as soon as I try a second time it’s gone again.

I mention Discord but I’m pretty sure this file picker screen is not directly associated with Discord.

Update: This is affecting a friend of mine as well in the same way from the same time. Haven’t determined if it’s just Discord yet.