There were multiple issues at play here. 1. If the plugin was disabled in ch.syncPlugins, then the prepackaged plugin would not be processed. Therefore, if there was an earlier version of the plugin that remained in S3, that would show up instead. Therefore, we have to let the full plugin extraction procedure go ahead, but not enable focalboard. 2. We also need to send the disablePlugin signal to the other node. But the signal won't be sent until the cluster leader is elected and inter-node communication is set up. Therefore, we need to listen to the ClusterLeaderChanged event and send out a disable plugin event as well. When both these issues are taken care of, then we would correctly see the version of the plugin from the prepackaged_plugins directory in the disabled state. https://mattermost.atlassian.net/browse/MM-49485 ```release-note NONE ```
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