I am big user of the side bar and also make every attempt to keep my phone locked and secure. I have had the beta 2 and now beta 3. My 4 year old grandson grabbed my phone to play a game but I notice he already had phone unlocked and game on. Took me a while to figure out that the side bar opened the phone even though I use bio and or a pin when locked. After digging I finally found you can lock the apps from showing on side bar when phone is locked till you unlock it. This should had been a thing like in android 14 when phone was locked side bar didn't show on lock screen at all.
I have tried multiple times to replicate it, and it always prompts the pin or biometric unlock. Maybe your grandson learned your pin and unlocked the phone.
