I use it on large amount of data(say 800 rows). However, the same is okay after recovery. Please help, once I lost all data but one column.
Please indicate your operating system and LO version. This type of behaviour usually indicates that a user profile reset is advisable. If the problem persists we may need to report a bug if none already exists.
Your question topic and content seems different. If you have crashes please fill a bug report with satisfactory details at https://www.libreoffice.org/get-help/bug/