same issue here, i'm using a acer sf314-59 with elan trackpad, i've notice that three finger swipe down will always be recognized, so if i want multitask view i put three fingers on trackpad, drag down a bit(this appears to be always recognized since my hidden dock always shows up, which happens when gnome is in this one-to one gesture session)and finally drag up to enter multitask view, i just moved from fedora35 to ubuntu 22.04, and fedora have no such issue at all
(i've also noticed that two finger scrolling upward sometimes isn't recognized either, and the cursor just moves as if i have only one finger on it, I wonder if you happens to have observed the same issue?)
Edit: I've downgraded libinput to 1.19.3, there is a significant difference in my case, now multifinger fail much less frequent, i'm currently running fedora 36