Filebeat not detecting new entries in a log file

Going to hold off on upgrading for now unless it's required to resolve the issue. Here's my config:

filebeat:
  prospectors:
    -
      paths:
        - /var/log/messages
        - /var/xyz/business/logs/su/tel-*.log
        - /var/xyz/business/logs/suproxy/tel-*.log
      input_type: log
      multiline:
        # The regexp Pattern that has to be matched. The example pattern matches all lines starting with [
        pattern: ^[0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{3}
        negate: true
        match: after
        max_lines: 10000
        timeout: 60s
  registry_file: /var/lib/filebeat/registry