Filebeat Fortinet Default Ingest Pipeline fails

I have multiple Fortinet devices pushing logs to a collector running Filebeat 7.8.0 with the Fortinet module enabled. All of the logs are being ingested but the pipeline fails at decoding/normalizing the timestamps.

I get the following error:

Text '2020-06-26 13:39:00Z' could not be parsed, unparsed text found at index 19

It appears to be an issue with how the _temp.time field is processed by the Ingest Pipeline but I have not to been able to isolate the issue.

I have the same issue. What version of the FortiOS firmware are you running?