telegram for android v11.1.3 (5244) store bundled

When I press the power button once, it goes to the lock screen. But when I enter my passcode, thus exiting the lock screen, all my Telegram chats including the secret ones come up. The whole point of having a passcode for Telegram is so that this doesn't happen, right? If someone was compelled to unlock the phone, Telegram should still be locked, away from snooping eyes.