EMQ X 4.2.1 is released now, it mainly includes the following changes:

emqx

Bug fixes:

• Fix the issue that the No Local logic is not handled correctly, which causes messages to accumulate in the flight window and message queue

  Github PR: emqx#3741 Github Issue: emqx#3738

emqx-bridge-mqtt

Bug fixes:

• Fix the issue that the rule engine MQTT subscription cannot receive messages

  Github PR: emqx-bridge-mqtt#108

emqx-dashboard

Bug fixes:

• Fix display error of long Client ID

  Github PR: emqx-dashboard#262

emqx-auth-mongo

Bug fixes:

• Fix the issue that only the first match is processed when the ACL query statement has multiple matching results

  Github PR: emqx-auth-mongo#231