I have noticed just this past week that I am no longer getting tavern regeneration in the tavern on my ships... only city regeneration.

I have a guild with the smaller Stormglory Bolt and a large guild with the Stormglory Tempest (I might be wrong on the names of the ships but they are the astral diamond flat ships, not the wonky plat ships with all the levels.)

Each ship has a tavern out on the main deck. When entering the boat, you get the city regeneration buff.

The odd thing is, if you walk to the area to either side of the lower deck door on either boat, the tavern regen kicks in and then stays on as you wander the upper deck. But it won't kick in unless you walk in that specific area and on the smaller boat, there's no reason to go there (unlike the big boat where you go that direction to reach the captain.)

Just thought I'd mention it in case the devs were not aware.