As the title says it all, there is an increase in HP when the sword and shield are equipped despite having no extra constitution on the sword or shield.
How did I notice this? very simple actually, when you’re HP fully regenerates it makes a sound, switching to the sword and shield from example the hatchet increases my HP by 23 points, then when I loot/gather something it immediately goes to full HP, but the sound effect of being full HP is delayed to like 5 seconds after, and that itself is probably why it interrupts the actions, the full HP check is delayed for some reason.
Also a small bug but in Reekwater if you accept the town board quest to hunt 3 Alligators you cannot complete the quest because in Reekwater there are no Alligators, there are only Gators… which look exactly the same as Alligators… probably the same for other regions which don’t have the Alligators.