When any entity (including a player) rides a vehicle, its hitbox has still the same size. This is mostly problematic for boats and minecarts as there you would be able to attack a player from underneath a boot or as seen here a player could get "for no reason" damage.
Linked issues
is duplicated by 11
MC-96290
A mobs hitbox in a boat will stick out, causing it to burn in lava
Resolved
MC-98749
The Player has an incorrect hitbox when riding a boat.
Resolved
MC-116733
Hitbox of a mob sitting in a boat not accurate
Resolved
MC-165380
Player hitbox show incorrectly when in a boat
Resolved
MC-203841
Player catches on fire if standing on a rideable entity close to lava
Resolved
6 more links
relates to 4
MC-116806
Wrong position of the player sitting in the minecart or boat during the opening / closing of the shulker box
Open
MC-90099
Player flying with Elytra has incorrect hitbox
Resolved
MC-210607
Using a spawn egg on zombies, zombie villagers, piglins, or zombified piglins in a filled boat causes the baby to suffocate in the ground
Open
MC-256652
Endermen are almost unable to attack Players on a Camel
Resolved
Attachments
Comments 28
Is this still an issue in the latest snapshot 16w44a? If so please update the affected versions.
This is an automated comment on any open or reopened issue with out-of-date affected versions.
Affects 18w31a. Better steps to reproduce: Sit in a Minecart, press F3+B, then F5 and teleport the minecart up: "/tp @e[type=minecraft:minecart] ~ ~20 ~"
The Player Hitbox changes when flying or swimming, so this Issue should be attended too.
18 more comments
Confirmed for 16w07b