After ending and resuming a session later, part of the last chat content was lost

[pacosoeda2]

Never happened before, but I was working in a session, ended with the end session button, an when I resume it later, loading from the history, I realized that approximately 1 hour or more of the chat messages were missing. The session is around 1500 messages, don't know it that has something to do with the issue , and if it is so, how I can stop it from happening again