Using 102.2.21-Beta (12.0a4) on android. Tried always prioritize .onion sites. Tried blog.torproject.org and the new reddit.com. Went to both sites. Neither redirected me to onion sites. Tor browser on alpha desktop forwards as expected.
I also have an issue with the tor-launcher migration.
I tried running normal Tor browser 11.5.7 (based on Mozilla Firefox 91.13.0esr) (64-bit) and have it open like normal. Launching Tor Alpha browser 12.0a4 (based on Mozilla Firefox 102.4.0esr) (64-bit) at the same time results in this popup. I guess non-standard setup would be running both normal Tor browser and alpha at same time. I have never been able to run both browsers at the same time. No change from previous alpha versions.
Tor Launcher
Tor exited during startup. This might be due to an error in your torrc file, a bug in Tor or another program on your system, or faulty hardware. Until you fix the underlying problem and restart Tor, Tor browser will not start.