Error sending fetch request, Group coordinator is unavailable or invalid

Hi all! Has anyone encountered such an error?

The consumer reads data from Kafka (version 6.0 from confluent). From time to time the following errors occur:
-Error sending fetch request
-Group coordinator (id: <> rack: null) is unavailable or invalid, will attempt rediscovery

Found an unresolved issue here: [KAFKA-7697] Possible deadlock in kafka.cluster.Partition - ASF JIRA

The error is not permanent. A couple of days may not be, and then several times in a row. Here it is advised to set a broker_id, but it already exists (java - The group coordinator is not available-Kafka - Stack Overflow).
max.records.per.poll, but it’s already 1.