Lanefan
Victoria Rules
It's on the DM to harshly smack this down when it happens, unless the character also acts that way when its player is present.We had completely ruled that out in my group long ago.
For players in the past would use this N-PC as the group's personal scout ahead/open everything/cannon fodder.
This veers into territory of making xp a player meta-reward rather than a reward for in-character actions; something I try to avoid at all costs.And since that group is not part of the active adventuring, they get no share of the treasure/XP/combat while they are "inactive".
So if a player only missed one session out of five for this module, they get four shares of the treasure/XP.
If a player was there for all five sessions, they get five shares of the treasure/XP.