Media Type Not Supported despite not setting restrictions

Description

Upgraded to 6.4.8 from 6.6.2 recently. All seems to be running ok except that some media uploads are now getting blocked - specific examples is “.mrt” report files. I don’t have anything configured for Accepted Media Types or Blocked Media Types so assume this is a change to the code.

Anyone else seen this and have a solution?

As this is client based, there are no logs to provide.

Server Setup Information

  • Version of Rocket.Chat Server:
  • Operating System: Ubuntu 20.04
  • Deployment Method: manual
  • Number of Running Instances: 1
  • DB Replicaset Oplog:
  • NodeJS Version: 14.21.2
  • MongoDB Version: 5.0.18
  • Proxy: nginx
  • Firewalls involved: