Csv - Wizard. Upload . Missing Features

Question/Issue:
Im Uploading Time-Series Data via csv - Wizard . Initially 18 minutes. After Uploading i just had ~14min. (5ms Sample rate).

-Then i broke the csv down to 150 samples. after uploading i just had 147.
Then i analysed the data, but there was no hint for not loading these specific Features.

-Then i noticed, that the Samples that are not uploaded are random, but always 3 of 150.

Project ID:
643986

Thx