Occasionally happens to me too. I believe I researched the cause being some kind of history corruption (eg bad control characters mistakenly pasted/output), and

Occasionally happens to me too. I believe I researched the cause being some kind of history corruption (eg bad control characters mistakenly pasted/output), and zsh will just make new history file if it detects corruption. Now, I made myself a cron script that once a day just copies the history file to a backup folder, so that I can bring it back if it ever corrupts.