Waterlogged blocks that are not full blocks trigger auto-jump even if it is disabled.

Any variant of non-full block with the property waterlogged=true will trigger auto-jump when being walked into from air, whether auto-jump is enabled or not.  This is true for chests, fences, walls, glass panes, iron bars, slabs/stairs with walls next to them, etc.

In the case of fences, the player will continuously jump, since it is not possible to jump over a fence.

This only occurs when the block is being approached from a side out of which water is not flowing. (In the case of it going towards a cliff, etc.)

I have attached linked (the attach kept giving me an error) a screenshot that demonstrates paths (with arrows) which should recreate this bug.

https://i.imgur.com/YNkyPPg.png