Missing Activities logs

Nexcloud 13.0.6


We have lost information in a file, and need to check who changed it.
By checking the “Versions” of the file, the changes where made the February 26 2019.
In the Activity panel, there is no activity since the 12 February 2019…

I have check my activities setting,
A file or folder has been changed or renamed is checked
Limit notifications about creation and changes to your favorite files (Stream only) is Unchecked.

Is it a bug or am-i missing something?
PS : A have attached pictures of the differents panels