They try to get on the newly arrived ship and use it as their home, but they cannot add it as their home.

Will you add the new ship here?

"Interrupt TP": {
"Interrupt Teleport At Specific Monuments": [],
"Above Water": false,
"Balloon": false,
"Boats": false,
"Cargo Ship": true,
"Cold": false,
"Excavator": false,
"Hot": false,
"Hostile": true,
"Hurt": true,
"Junkpiles": false,
"Lift": true,
"Monument": false,
"Ignore Monument Marker Prefab": false,
"Mounted": true,
"Oil Rig": true,
"Safe Zone": false,
"Swimming": true
},

Those settings (afaik) allow you to tp from ships/boats not to them, as the ship/boat is constantly moving the plugin would have to recalculate the coords each time you wanted to tp to it,

closing this duplicate

see here https://umod.org/community/nteleportation/49268-suggestion-ability-to-create-home-teleports-on-tugboats?page=1#post-12