Yep, also happens to me on my macOS 10.15 iMac.. It will go to sleep, then when I wake it up, I get a flash of my desktop before the lock screen shows.. Too f

Yep, also happens to me on my macOS 10.15 iMac.. It will go to sleep, then when I wake it up, I get a flash of my desktop before the lock screen shows.. Too fast to write anything down by hand, but you could certainly point a 60fps camera at it and get something I'm sure.