Bitcoin node stopped finding peers via Tor

[wulfstan]

I've been running a Bitcoin Core full node on an Ubuntu server for years. Bitcoind connects via Tor to hide my Bitcoin usage from my ISP. In mid-December I suddenly stopped getting peers and I stopped downloading new blocks.

This is how my bitcoin.conf looks:

proxy=127.0.0.1:9050
listen=1
bind=127.0.0.1

As soon as I commented out the above lines, I found peers again and new blocks were successfully downloaded (but I'm no longer behind Tor).

Tor seems to be running fine on my server—I can still connect to a hidden service set up on the same machine, and the output of "curl --socks5 localhost:9050 --socks5-hostname localhost:9050 -s https://check.torproject.org/ | cat | grep -m 1 Congratulations | xargs" is 'Congratulations. This browser is configured to use Tor.'

I would like to resume using my node behind Tor. Any help is appreciated.

btw: I'm using Bitcoin Core 0.21.1.

[nc50lc]

Have you updated Tor recently?

You might get additional hints about the issue by adding --debug=tor arg when starting Bitcoin Core.
Then check your latest debug.log entries for lines containing "[tor]" tag.

For now, you can review section 2 or 3 of Bitcoin Core v0.21.1's Tor documentation: github.com/bitcoin/bitcoin/blob/v0.21.1/doc/tor.md