Octoprint should not issue G29 if G29 has been added to the list of blocked commands

See:

2021-01-23 09:21:11,544 - Recv: == T:200.38 /200.00 == B:59.99 /60.00 @:64 B@:127
2021-01-23 09:21:13,508 - Recv: echo:busy: processing
2021-01-23 09:21:15,521 - Recv: echo:busy: processing
2021-01-23 09:21:17,519 - Recv: echo:busy: processing
2021-01-23 09:21:19,485 - Recv: X:180.00 Y:180.00 Z:12.62 E:0.00 Count X:14400 Y:14400 Z:10096
2021-01-23 09:21:19,521 - Recv: Writing to file: bin
2021-01-23 09:21:19,533 - Recv: echo:enqueueing "G29"
2021-01-23 09:21:19,554 - Recv: echo:Bed Leveling On
2021-01-23 09:21:19,557 - Recv: echo:Fade Height 2.00

This is your firmware issuing an G29 internally, not OctoPrint.