We use Clickhouse version 22.3.3.44, and met with with some wrong behaviour - 
queries "ALTER TABLE ... MODIFY COMMENT ... " does not work on ReplicatedMergeTree engine.

Bug reproduce script:
```
CREATE TABLE sandbox.test__calendar
(
    `dttm` DateTime COMMENT 'date and time',
    `timestamp` Int64 COMMENT 'event timestamp',
    `year_num` Int32 COMMENT 'year number'
)
ENGINE = ReplicatedMergeTree() PARTITION BY year_num ORDER BY timestamp
COMMENT 'Comment text for test table';

SELECT comment FROM system.tables WHERE name like 'test__calendar'; -- 1 row selected with correct comment text

ALTER TABLE sandbox.test__calendar MODIFY COMMENT 'Some new more detailed text of comment';

SELECT comment FROM system.tables WHERE name like 'test__calendar'; -- 1 row selected, but with OLD(!) comment text
```

Maybe it will be helpfull, ALTER TABLE query returns such result:
```
host            |status|error|num_hosts_remaining|num_hosts_active|
----------------+------+----+-----------------------+------------------+
10.7.179.41     |     0|    |                      1|                 0|
ak1-st-data-01  |     0|    |                      0|                 0|
```
}
            auto zookeeper = getZooKeeper();
            
            if (!zookeeper->exists(fs::path(zookeeper_path) / "replicas" / replica / "is_active"))
            {
                LOG_WARNING(log, "Replica {} is not active during mutation. Mutation will be done asynchronously when replica becomes active.", replica);
                inactive_replicas.emplace(replica);
                break;
            }
            String mutation_pointer = fs::path(zookeeper_path) / "replicas" / replica / "mutation_pointer";
            std::string mutation_pointer_value;
            
            if (!zookeeper->tryGet(mutation_pointer, mutation_pointer_value, nullptr, wait_event))
            {
                LOG_WARNING(log, "Replica {} was removed", replica);
                break;
            }
            else if (mutation_pointer_value >= mutation_id) 
                break;                                      
            
            if (wait_event->tryWait(1000))
                continue;
            
            
            auto mutation_status = queue.getIncompleteMutationsStatus(mutation_id);
            
            if (mutation_status && !mutation_status->latest_fail_reason.empty())
                break;
        }