Can you check the lock screen dialogue box and relay your findings on T119 ?
I had just live booted to check. can't really get to a password entering box in live
My current 20.04 daily ISO keeps going to screensaver as I'm stuck.. i move pen near screen (wacom pen) & it wakes; no password entry required -- good thing for me, I'm stuck on getting virtual-keyboard working as I have no keyboard [this QA-test]. On live session current operation is exactly as I'd prefer (I know some other flavors do require password)
Just booted a 20.04 install [dell [optiplex] 780 (c2q-q9400, 8gb, amd/ati cedar radeon hd 5000/6000/7350/8350)] that I hadn't used in awhile (used for testing & support so maybe pretty clean/default unless I've changed things for support-testing). Opening screensaver options on boot and it was set (*one saver*) to an uninstalled 'flurry'. On preview it only got black screens with error (uninstalled). I did a apt full-upgrade and when I returned the screensavers were working (flurry on both displays).
I noticed the change to 'flurry' awhile back on my own [primary; dell [optiplex] 960 (c2q-q9400, 8gb, amd/ati cedar radeon hd 5000/6000/7350/8350)] box; but due to upstream [LXQt] bug the screensaver only hides one of my displays, the display I often turn off and thus usually isn't powered when I wake my system from suspend (in the morning); thus often don't even see screensaver.
Screensaver looks good to me :)