Hey, your history should not ever get wiped unless you:
a) Delete the history yourself, inside the editor
b) Downgrade Cursor to an older version
c) Interfeer with the database within Cursor that stores the history
d) An external program (like antivirus), has modified the files
e) You wipe your machine, or use Cursor on a new machine (history is stored locally, not on the cloud)
If your history is lost for any of the above reasons, it is most likely unrecoverable unfortunately.