Compacting bucket does not finish

I have my cluster setup (couchbase 5.1.1 community) with auto-compacting. I noticed the progress bar from the UI, going from 60% back down to 30% and so on. It seems to never finsh, is this normal? I tried to find a log file to give me more info, the only one I see is debug.log. I do not see any errors, so not sure why it keeps restarting.

please let me know what I can do.