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|
```
const IMergeTreeDataPart & part, DiskType disk_type) const
{
    String best_replica;
    zkutil::ZooKeeperPtr zookeeper = tryGetZooKeeper();
    if (!zookeeper)
        return "";
    Strings zc_zookeeper_paths = getZeroCopyPartPath(*getSettings(), disk_type, getTableSharedID(), part.name,
            zookeeper_path);
    std::set<String> replicas;
    for (const auto & zc_zookeeper_path : zc_zookeeper_paths)
    {
        Strings ids;
        zookeeper->tryGetChildren(zc_zookeeper_path, ids);
        for (const auto & id : ids)
        {
            String zookeeper_part_uniq_node = fs::path(zc_zookeeper_path) / id;
            Strings id_replicas;
            zookeeper->tryGetChildren(zookeeper_part_uniq_node, id_replicas);
            LOG_TRACE(log, "Found zookeper replicas for {}: {}", zookeeper_part_uniq_node, id_replicas.size());
            replicas.insert(id_replicas.begin(), id_replicas.end());
        }
    }
    LOG_TRACE(log, "Found zookeper replicas for part {}: {}", part.name, replicas.size());
    Strings active_replicas;
    
    
    active_replicas.reserve(replicas.size());
    for (const String & replica : replicas)
        if ((replica != replica_name) && (zookeeper->exists(fs::path(zookeeper_path) / "replicas" / replica / "is_active")))
            active_replicas.push_back(replica);