I found many warning messages in the MySQL's log like this one
2019-11-07 05:03:19 1739 [Warning] IP address '188.8.131.52' could not be resolved: Temporary failure in name resolution
Did you modify the MySQL's configuration? The Bitnami Support tool didn't get that file (/opt/bitnami/mysql/my.cnf), can you share it here?
Apart from that, I only see 2 restarts in the MySQL's log
2019-11-09 00:22:59 1739 [Note] /opt/bitnami/mysql/bin/mysqld.bin: Normal shutdown
2019-11-09 00:25:14 1715 [Note] /opt/bitnami/mysql/bin/mysqld.bin: Normal shutdown
Were they unexpected shutdowns? I didn't find any error in the MySQL's log.