After activating the pressure plate, the hole opens in the table to drop down. There is enough time to get to the plank before it opens, allowing you to just fall straight down, but for some reason it continuously teleports me back to the surface of the table. If done in a certain way, you can even enter a perpetual teleportation loop of you falling.
Currently on 1.19.3, so it may have something to do with position and crouch/crawl detection, like how swimming through a 1 block hole teleports you backwards. Video displayed is modded, but I have tested and confirmed it happens in pure vanilla as well.
I'm able to consistently recreate it, and my most recent attempt, as shown in the video, resulted in me getting permanently stuck. I had to use a teleport scroll to escape. Luckily, at some point while spamming the teleport ability, I was able to move close enough to the objective to trigger the next stage of the quest. But this should probably be something that's looked into and fixed.

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