you did complete it twice (and not collected the second reward) ?
because looks like the the reward for the first time is already collected (would also have the portrait)
so I don't see any bug because the green arrows only show what have been done for the next historian reward (not for the collected one)
and as soon as all are done and the reward is collected a green arrow should go away if you have done that only once
and the numbers don't show how often you have completed them
but how many times you still could do them
Confirmed, will be reported/rewarded soon. Thanks.
what bug ?
the only bug would be if he hasn't collected the reward
but if that would be the case he sure would have posted that
and I guess the urgency be much higher than minor if he didn't get the reward