You end up with a HP display like "Health: (23/23) (24)"; one isn't rotted, but when print_stats_hp calls get_real_hp(true, true) it gets a value different to one's max HP.
(NB while this specific display oddity is seen on console, the failure to gain max HP is real, not just a display issue; that's why I've marked this "major" and "All Both".)
Your max HP catches up when something else happens to recalculate it - eg, saving and loading.
I attach a save that demonstrates this bug. Load it, create an Orb Guardian, kill it, then quaff a potion of magic to cause the stats display to redraw: "Health: 179/179 (1". Saving and loading then gives one "Health: 179/180".
Hatham.cs [^] (103,191 bytes) 2019-08-04 23:22 
