Not sure if debug logging is left on, or something.
But it seems the most recent released build (1.12-0.57.0) seems to log every single block it replaces to log.

Here's a small snippet of my log.
I can provide the full log if you want but it's over 456k lines long :P
https://gist.github.com/Lanse505/ce64102e23191f26a7d80b0fffe2cd03