Sort order incorrect for variable length DESC columns

Steps to reproduce:
1. Create a table:
CREATE TABLE mytable (id BIGINT not null PRIMARY KEY, timestamp BIGINT, log_message varchar) IMMUTABLE_ROWS=true, SALT_BUCKETS=16;
2. Create two indexes:
CREATE INDEX mytable_index_search ON mytable(timestamp,id) INCLUDE (log_message) SALT_BUCKETS=16;
CREATE INDEX mytable_index_search_desc ON mytable(timestamp DESC,id DESC) INCLUDE (log_message) SALT_BUCKETS=16;
3. Upsert values:
UPSERT INTO mytable VALUES(1, 1434983826018, 'message1');
UPSERT INTO mytable VALUES(2, 1434983826100, 'message2');
UPSERT INTO mytable VALUES(3, 1434983826101, 'message3');
UPSERT INTO mytable VALUES(4, 1434983826202, 'message4');
4. Sort DESC by timestamp:
select timestamp,id,log_message from mytable ORDER BY timestamp DESC;

Failure: data is sorted incorrectly. In case when we have two longs which are different only by last two digits (e.g. 1434983826155, 1434983826100) and one of the long ends with '00' we receive incorrect order.
Sorting result:
1434983826202
1434983826100
1434983826101
1434983826018