MariaDB 10.3 gap of numbering of the sequence

Question

I have a table where id is primary key and squence. In transaction I call sequence

select NEXTVAL(next_cons_id) as next_cons_id

then create a new record where field id = next_cons_id got from code bellow.

DDL sequence

CREATE SEQUENCE IF NOT EXISTS next_cons_id START WITH 1;

In most cases it work well. Having done a small study I found some patterns.

Id, ... gap ..., nextId
606401,605557,
604556,605401,
603555,604401,
602594,603401,
601594,602401

Ids with dates:

601594  2019-10-10 00:04:54
602401  2019-10-10 01:36:33
602594  2019-10-10 21:46:43
603401  2019-10-11 01:19:49
603555  2019-10-11 21:41:26
604401  2019-10-12 00:30:09
604556  2019-10-13 00:15:32
605401  2019-10-13 03:51:42
605557  2019-10-13 22:42:22
606401  2019-10-14 02:14:28

And after I did create console script that make insert by one record per second in test table:

237343  2019-10-14 00:31:03 2019-10-14 00:31:03
237344  2019-10-14 00:31:03 2019-10-14 00:31:03
....gap...
238000  2019-10-14 00:31:04 2019-10-14 00:31:04

It table use only test script.

But it time we can see some problem:

There were no network problems at this point

In monitoring of zabbix rollback of transactions not found.

Database has one replication server.

Server version: 10.3.13

Do you have any ideas to fix this?

UPD: I remove the sequence and recreate this table with id primary key autouncrement but this case has been repeated.