getTableColumnsFromDatabase - Failed to read column metadata with I/O Error

We experience an exception that is causing the task to stop in our postgres connector.

We see the following error in the logs.

[ERROR] 2021-11-25 10:29:25,245 [debezium-postgresconnector-GatewayDepot87-change-event-source-coordinator] io.debezium.connector.postgresql.connection.pgoutput.PgOutputMessageDecoder getTableColumnsFromDatabase - Failed to read column metadata for 'public.tbeventqueue'
[ERROR] 2021-11-25 10:29:25,245 [debezium-postgresconnector-GatewayDepot87-change-event-source-coordinator] io.debezium.pipeline.ErrorHandler setProducerThrowable - Producer failure
org.postgresql.util.PSQLException: An I/O error occurred while sending to the backend.

We are connecting Postgres Connector 1.7.1 to PostgreSQL Database version 13.5. This error occurs sometimes (i.e. we can't replicate this reliably) under the following conditions:

• The connector is created
• A certain timespan passes (some hours) without inserting data to the table we specify in table.include.list
• After the timespan we insert some data to the table -> then the exception occurs, connector task fails.

We are aware of DBZ-3769 which reports a similar error, however we fail explicitly with Error "An I/O error occurred while sending to the backend" and are already on 1.7.1.