Browser Close Upon Backspace Unavailable

Hello there! One of the core functions of the Brave Android browser seems to be its ability to functionally back out of anything using backspace in order to leave the browser at any time for any reason. I have no issue with this fundamentally, but one key downside related to my work is that every Private tab is immediately eradicated the moment I back out of active browsing with the backspace function. I simply don’t wish for everything I do to remain well-known on my primary browser, and even go so far as to have chains of activity long enough to shut itself off from the new tab page that I try to retract to, which also triggers the backspace closure of the browser due to it falling into the same flawed function. Multiple hours of Private work should have the option not to be closed by simply pressing a button enough times, or at minimum, a prompt before closure should flag that can’t also be backspaced out of. Maybe I mistakenly left a setting on I’m not aware of, but this seems more indicative of a desired unavailable setting I’d like the option for, or otherwise a default warning of.