After update to 1.0.8, the tugboat doesn't follow route, but spins in place instead. Video demonstration: https://youtu.be/rdcK0-08FHA

Hey, thanks for reporting!

Is this in a specific modpack? Are you using optifine or "small ships" mod?

Does replacing the vessels help?

I am not able to reproduce this in my 1.16 dev environment

Yes, this is Enigmatica 6 (Expert). Yes, there is "Small Ships" mod in that modpack, but no optifine.

I have tried downgrading to mod 1.0.5, but that didn't completely fix the problem - the area around the dock is, for some reason, not accessible for tugboat (neither with attached boats, nor alone).

Couple things:

Make sure there is no small ships boat nearby, they mess with pathfinding.

Make sure there is a node inside the dock so that the tug actually sails though there

How "nearby" is nearby? There was a small ship nearby (a couple of blocks behind the dock)...

Yep, that's close enough. Just remove it. We've had 4 people report this already. They do something to water mob AIs when in range. Keep them few chunks away.

Ah. That explains everything.

EnigmaticaModpacks/Enigmatica6#4561

Enigmatica PR to fix this

@iarspider it appears that disabling WaterMobFlee in small ships config solves this