Issue on loading data from Mysql db to QlikCloud

[LucyInTheSky]

We encounter a strange error when loading data from a Mysql database
The value of a field is not always loaded even if it exists in the data source.
We have changed charset of mysql database, table and field to utf8mb4_unicode_ci without results.
It would seem to be a Connector problem, what can we do?

Suorce table data

10000	AREA4
10001	AREA8
10002	AREA8
10003	AREA8
10004	AREA8
10005	AREA8
10006	AREA8
10007	AREA8
10008	AREA8
10009	AREA8
10010	AREA8
10011	AREA8
10012	AREA8
10013	AREA8
10014	AREA8
10015	AREA8
10016	AREA8
10017	AREA4
10018	AREA6
10019	AREA8
10020	AREA8
10021	AREA8
10022	AREA8
10023
10024
10025	AREA8
10026	AREA8
10027	AREA8
10028	AREA8
10029	AREA8
10030	AREA8
10031	AREA8
10032	AREA8
10033	AREA8
10034	AREA8
10035	AREA8
10036	AREA6
10037	AREA8
10038	AREA8
10039	AREA8
10040	AREA2
10041	AREA8
10042	AREA8
10043	AREA8
10044	AREA8
10045	AREA4
10046	AREA8
10047	AREA8
10048	AREA8
10049	AREA8
10050	AREA8
10051	AREA8
10052	AREA8
10053	AREA8
10054	AREA8
10055	AREA8
10056	AREA8
10057	AREA8
10058	AREA8
10059	AREA8
10060	AREA8
10061	AREA8
10062	AREA8
10063	AREA8
10064	AREA8
10065	AREA8
10066	AREA8
10067	AREA8
10068	AREA8
10069	AREA8
10070	AREA8
10071	AREA8
10072	AREA8
10073	AREA4
10074	AREA8
10075	AREA8
10076	AREA8
10077	AREA8
10078	AREA8
10079	AREA8
10080	AREA8
10081	AREA8
10082	AREA8
10083	AREA8
10084	AREA8
10085	AREA8
10086	AREA8
10087	AREA8
10088	AREA8
10089	AREA8
10090	AREA6
10091	AREA2
10092	AREA5
10093	AREA5
10094	AREA5
10095	AREA5
10096	AREA5
10097	AREA8
10098	AREA8
10099	AREA8