Bug: Older Leo history being deleted, did not happen before

Hi all,

I have a problem that only started recently. Normally when my Leo conversations get very long, first I am warned that Leo might start forgetting soon, and eventually the conversation is locked entirely when I’ve reached my free limit and I am prompted to upgrade to Premium.

However, now when my conversations get long, I still get the warning that the conversations are long, but I am not locked when the conversation length reaches it’s limit. Instead, older entries in the history are being deleted to make room for new ones. This is very alarming as older entries (both questions and answers) are critical to my research, and losing those entries is quite devastating. I was inclined to upgrade to Premium up until I encountered this bug; I cannot upgrade to Premium without having peace of mind that Brave Leo will retain all history at all times.

Additional Details:
Using Llama 3.1 8B model
One browser profile
No recent changes in themes or extensions or changes to Brave Leo settings
Issue observed on two Windows PCs with Brave that are synced (all settings, same profile)
Browser is up to date on both computers Version 1.78.102 Chromium: 136.0.7103.113 (Official Build) (64-bit)

Is this a bug? Or how can I fix this?