I found out that the lightning trainer has a progress_bar_refresh_rate argument (default set to 1) which produces the spamming logs. If I set that to 10, I get 1/10th of the spam (but a janky progress bar in the console). I could set it to 0 to disable it, but that's not really a fix. What I'd really want is the same behaviour in the console (one smooth progress bar) and one line per epoch in the logs; high hopes, right? 😊