If you experience bugged vehicles (get tipped under world and strange bugs like that) please open config.yml of WorldGuard and set this:
block-plugin-spawning: false
{% hint style="warning" %}
If you have problems with vehicles and you're using Towny plugin open Towny config.yml
and remove Slime from here:
{% endhint %}
town_mob_removal_entities: Monster,Flying,Shulker,SkeletonHorse,ZombieHorse
If you own Mob Farm Manager plugin please make sure to check if you set any entity type SLIME
rule, this may remove the slime which is part of the vehicle and cause this bug.
Use the command /res set monsters t/r
inside a Residence.
I already contacted Residence developer and I hope they will fix this
Please remove any group/merge/removal feature on entity type SLIME
.