I think I have found an issue. This has been tested on a campaign with no other Extensions loaded except this one.
This happens if the Option - CT: NPC hit points is set to Max. And the Rolled HP in Live HP is set to Standard.
When you first drag the NPC to the Combat Tracker it correctly overrides the Standard HPs on the NPC sheet and loads the NPC onto the Combat Tracker with Max Hit Points. So far, so good.
If however, you then add an effect, on the Combat Tracker for that NPC, that changes the CON then it changes the HPs to Standard and adds the CON change instead of keeping the Max HPs and adding the CON change.
It's somewhat of a niche case but one I run into a lot as I always set my NPCs to max hit points and whenever a CON effect is added the Hit Points revert to Standard.
https://fantasygrounds.com/forums/at...3&d=1645420973

