[wagyourtail]

should this apply to anything else?

it appears to have an issue with going down waterlogged stairs and I'm not sure why...

https://cdn.discordapp.com/attachments/822210907173421116/953478457252274256/Peek_2022-03-15_19-20.gif

[StealthyPony]

Also affected:
Trapdoor

[wagyourtail]

in my testing it appeared to work with trapdoor...

[StealthyPony]

Odd, when I did the test with trapdoors it chose swimming through the water over walking on the trapdoors
If I surrounded the starting block with trapdoors it failed to path to the goal completely, giving the "No path found :(" message
My starting and goal blocks are both full blocks, perhaps that had something to do with it

[leijurv]

I remember testing this in late 2019-ish, and making stairs canWalkOn made it do stupid stuff with failing parkour jumps. I think this needs a check to see if the stair is upside down. Right side up stairs shouldn't be canWalkOn if I remember correctly?

[EvModder]

I opened #5152 against 1.21.4, covering the same (general) case. It adds isWaterloggedSolidTop (wogged, with a sturdy top face) and exempts some blocks from water checks in canWalkOnBlockState, from the water-landing check in MovementDescend, and from the assumeWalkOnWater checks in MovementPillar and MovementParkour.

So falls onto a wogged top slab are also kept, with fall damage, instead of being treated as impossible water landings.

It doesn't change stairs, so the parkour concern above about right-side-up stairs is still a thing.