**How to reproduce**
Clickhouse server 20.13.1.5273
```
CREATE TABLE default.test
(
`key` UInt32,
`ts` DateTime CODEC(DoubleDelta, LZ4),
`db_time` DateTime DEFAULT now() COMMENT 'spout-ignore' CODEC(DoubleDelta, LZ4)
)
ENGINE = MergeTree
PARTITION BY toStartOfTenMinutes(db_time)
ORDER BY (key, ts)
TTL db_time + toIntervalHour(3)
SETTINGS index_granularity = 8192, merge_with_ttl_timeout = 3600, min_rows_for_compact_part = 1000000, min_bytes_for_compact_part = 200000000, in_memory_parts_enable_wal = 0;


INSERT INTO test(key, ts) SELECT number % 1000, now() + intDiv(number,1000) FROM numbers(500);

SELECT * FROM test;
500 rows in set. Elapsed: 0.003 sec.

DETACH TABLE test;

ATTACH TABLE test;

SELECT * FROM test;

0 rows in set. Elapsed: 0.002 sec.
```

**Expected behavior**
Clickhouse would flush parts on disk.
bool moveParts(const CurrentlyMovingPartsTaggerPtr & moving_tagger);
    
    CurrentlyMovingPartsTaggerPtr selectPartsForMove();
    
    CurrentlyMovingPartsTaggerPtr checkPartsForMove(const DataPartsVector & parts, SpacePtr space);
    bool canUsePolymorphicParts(const MergeTreeSettings & settings, String * out_reason = nullptr) const;
    std::mutex write_ahead_log_mutex;
    WriteAheadLogPtr write_ahead_log;
    virtual void startBackgroundMovesIfNeeded() = 0;
    bool allow_nullable_key{};
    void addPartContributionToDataVolume(const DataPartPtr & part);
    void removePartContributionToDataVolume(const DataPartPtr & part);
    void increaseDataVolume(size_t bytes, size_t rows, size_t parts);
    void decreaseDataVolume(size_t bytes, size_t rows, size_t parts);
    void setDataVolume(size_t bytes, size_t rows, size_t parts);
    std::atomic<size_t> total_active_size_bytes = 0;
    std::atomic<size_t> total_active_size_rows = 0;
    std::atomic<size_t> total_active_size_parts = 0;
    
    mutable std::set<String> query_id_set;
    mutable std::mutex query_id_set_mutex;
    
    MatcherFn getPartitionMatcher(const ASTPtr & partition, ContextPtr context) const;
    
    virtual std::unique_ptr<MergeTreeSettings> getDefaultSettings() const = 0;
    void loadDataPartsFromDisk(
        DataPartsVector & broken_parts_to_detach,
        DataPartsVector & duplicate_parts_to_remove,
        ThreadPool & pool,