Possible Security problem using Copilot with out loggin IN as Chats gets imported as soon as someone Logs in

i see that the system still saves and "import" any conversation with Copilot before the account its logged on, i believe this could be seen as a data leak

let me explains, OS windows 11, browser Supermium 126 x86

like a mont ago i saw it for the first time, a machine that was not my main computer where used to ask copilot certain details and info, after that someone elses logged with a google account and all my previous chats where IMPORTED on her account, in that moment i did the first report using her account
Today as i set again my machine after a harddrive crash, i was using copilot and after loggin in, i just noticed that it TOO imported the chats into my account
i see that as a potential data leak and wanted to adrees it, MAYBE its limited to this browser, but its important to alert the rest of the users