What you were expecting to happen, and what actually happened:
When looking at a troop’s skill, on the right hand side the game shows a description of parts of a skill. Werebat correctly has help text for Steal Life and Death Mark, but is missing help text for Lycanthropy.
How often does this happen? When did it begin happening?
Every time
Steps to make it happen again
Look at Werebat’s skill.
EDIT: Whoops, not a bug. Gems like doomskulls don’t get the descriptive help text.
I misspoke. I meant to say it’s based on Lycanthropy gems on the board, not Lycanthropy itself. The “help text” is on the left side, which shows how many Lycanthropy gems are on the board, like other cards based on gems on board.