Invited tournament ends earlier than quest time limit

[tos1]

For example, 12 days left for the player in the quest page at the time invited, but actually it ended 3 days after the invitation (9 days earlier).

AFAIK, the initial time limit seems to be always 12 days whenever tournaments invitation occurred and they ends earlier than 12 days.

- How to reproduce it/when/why it happens:
Wait for the invitation for a tournament, check left days in the quest information page. Don't attend the tournament and check when it expires.

- Game version (and steam or downloaded):
AWoIaF v8.2, Warband v1.174 downloaded
(Note: v8.1 + WB v1.167 has the same problem.)