Created a Faithful Hound token with the Mordenkainen vanguard when I had 26 loyalty, but the token did not gain Vigilance
This is an intermittent bug
Happened again in the next game. Both times I replaced one of the three creatures I already had in play with the Hound.
Hello @Janosik ,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me 
Rebeca.