Seems the experience for mysterious artifacts is broken.
I drank a brain elixir and collected 2 mirror of ereseid foundables.
The rewards summary each said over 300 exp, but the quest log shows 14 total exp
Yes, in magical sports weekends was same bug. Xp vs family points
Also apparently dumbledores cabinet
Edit: its mistaking the family points for exp in the family. Ugh.
No, it isn't mistaking anything. It clearly says "mysterious artifacts family xp", that is the family points (the ones you only get from mysterious artifacts). It is not wizarding xp.
Then it’s poorly designed. To complete it, at an average of 4 “family exp” per encounter, that’s about 200 foundables/wizard challenges to complete
@Alericus don't forget that every time you place an item in the registry you are awarded bonus family xp. The amount varies depending on the threat level of the item and the level of the page, but it makes a big difference.
For example: placing the pensieve on the basic frame gives 50 fxp, placing it on bronze gives 120 fxp, and so on. 800 fxp is definitely doable if you focus on placing items.