Plugin Configurations Wiped in HA Environments When Plugin Subsystem Is Disabled and Re-enabled

Applies to: Mattermost Server v11.7.6 and earlier; High Availability cluster deployments.

Symptoms: Disabling and re-enabling the Plugin Subsystem in System Console wipes all plugin configurations in an HA cluster.

🛑 Problem

In HA clusters, nodes can have partially inconsistent plugin config views due to async synchronization. When the System Console sends a config PATCH with an incomplete plugin subset, the server overwrites the full plugin config with partial data, deleting configs for plugins not in the payload. Specific to HA environments; single-node deployments unaffected.

✅ Solution

Upgrade to v11.7.7 or later (fix backported to v11.7 ESR; also in v11.10).

v11.7.7 changelog: "Fixed an issue with plugin configuration loss on High Availability nodes with incomplete plugin sync."

• v11.7.7 Release
• Mattermost Upgrade Guide
• High Availability Configuration