3.0.1 cbbackup hangs/freezes on certain buckets

We are using CB 3.0.1 and are experiencing an issue where backups are freezing/hanging when performed.

/opt/couchbase/bin/cbbackup http://localhost:8091 ./couchbase -u <user> -p <password> -v

We have multiple buckets but when one of them, lets call it bucket1, the cli stops outputting any information and I have to kill the backup process with CTRL+C. Upon inspecting the directory, I can see that the bucket in question is missing. Upon searching for answers, I have seen that there was a bug in this release that made this backup consume a lot of resources, but we are talking about only a few thousand documents here, about 100MB in total. The machine itself has 16 GB RAM which is barely used so it should be enough.