Unstable in data load (QLik sense Nov 2019 patch 2)

[thi_pham]

I got a very serious issue with data load in Qlik sense version Nov 2019 patch 2.

I load data from MS SQL server, no data changed at the time I load, but 4 times I load data, number of records loaded are different from: 

Such as:

1st time: 10k records

2nd time: 20k records

3rd time: 25k records (this is the number I expected)

4th time: 25k records. It's fine from now. 

It occurs quite frequent and make me lost the trust with my users. Does any body got same issue?