Bullet and Numbering space before line problem in writer

I often face a problem when using bullets and numbering in libre office. At random times it leaves a space (about a tab) before some bulleted or numbered lines (not always in all of them). It happens without me changing any option, and I do not find differences between a normal and a problematic line in “paragraph” or “bullets and numbering” menus.
Anyone has any idea what can cause this problem?

I think i figured it out.
I had formated the text, by changing the default in “Styles and Formating”. This added a space in every first line of paragraph before the bullet. If you format the bullets style from “Styles and Formating”, the default is not applied, and the problem is solved.