Unable to log in to Facebook through onion site using Tor Browser

For over a year I’ve been unable to log in to Facebook through their onion site using Tor Browser.

The first page loads (often with a “You’re temporarily blocked” message, first image below) but I can submit username and password and click the “Log In” button.

After clicking “Log In” the page goes blank and then briefly (0.5 seconds?) flashes a Facebook logo in the middle of the browser window and a “from Meta” text towards the bottom of the page (second image below; this is so fast I haven’t been able to screenshot it, so instead I’ve just used a camera). After that the page goes blank again, and stops loading (third image below). At that point the URL begins with https://www.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/two_step_verification/authentication/?encrypted_context=

This is happening on Debian using Tor Browser version 15.0.6 (but it’s been going on for over a year with different versions) set to “Standard” browser security level.

To me it looks like the two step authentication isn’t working when using Tor Browser.

Anyone else experiencing this issue?

Screenshot+picture+screenshot: