If FF 9 Crash will delete all the History list and Searches of today

I am using the latest version of FF 9, and there is something I do not know if it is a bug, and error, or something intentional and done by design.

I have seen that sometimes and frequently (sorry do not know when) If FF 9 Crashes, and then reopen it, is most possibly that all the History list made today or recently are deleted and removed and only is kept the other history options, and also it deletes all the Searches list

Sorry that I do not know how to reproduce it exactly, as it only happens when FF crashes

Using macOS Catalina 10.15.5

Thanks for any possible explanation or know why this may be happening