compat

Author: Alicja Kucharczyk

articles/postgresql/flexible-server/concepts-query-store.md

@@ -279,7 +279,8 @@ This function discards all statistics gathered in-memory by Query Store (that is
 ## Limitations and known issues
 [!INCLUDE [Note Query store and Azure storage compability](includes/note-query-store-azure-storage-compability.md)]
 
-- If an Azure Database for PostgreSQL flexible server instance has the parameter `default_transaction_read_only` set to on, Query Store doesn't capture any data.
+### Read-only mode
+When an Azure Database for PostgreSQL - Flexible Server instance is in read-only mode, such as when the `default_transaction_read_only` parameter is set to `on`, or if read-only mode is [automatically enabled due to reaching storage capacity](concepts-limits.md#storage), Query Store does not capture any data.
 
 ## Related content