This option should probably be removed as its a descendant of an option that allows "old tnt cannon" behavior before ~1.9 But this improves the fix so properly update the velocity/position rather than the questionable way it was doing it before.
This more properly implement spigot's fix for teleportation area effect clouds, now however supporting many other entity types specified in this bug report.
Currently, this is not an issue for (all) hanging blocks since they have a fix identical to this inside of setPos. Note however the client does not nicely support moving these entities anyways.
Ports the follow commits from spigot to paper.
All credits to go the respective commit authors listed below.
CraftBukkit: 3b4fd5b321f4440a2b3a67f3945739b45e6e687f
By: md_5 <git@md-5.net>
Replaced the Boolean-based visual fire system with TriState for improved clarity and flexibility, enabling three distinct states: TRUE, FALSE, and NOT_SET. Deprecated older methods in favor of new ones and updated internal handling to reflect these changes. Adjusted serialization and deserialization logic to accommodate the new TriState implementation.
Previously the server attempted to compute the block placed by using the
BlockPlaceContext. This approach however fails on replacable blocks, as
the BlockPlaceContext computes this during its construction, which
happened after the actual world modification.
The commit reworks this approach and now stores metadata in the
InteractionResult which can later be read.
The diff is structured to allow for easy future expansion of the tracked
metadata.
The exit location passed to PlayerTeleportEvent/PlayerTeleportEndGatewayEvent in ServerPlayer#teleport(TeleportTransition) needs to be cloned, as it is later compared in case it was changed. Not cloning it results in the ability for plugins to mutate it but such changes will be ignored, as the instance of the Location being the same results in a successful equality check.
It is not necessary to clone the location in other instantiations of the event (or subclasses) as those are not compared afterwards to change the outcome.
Owen