Buff Durations

[tsompanis]

So yesterday i was making the fishing daily (lol) and i had the bait buff on me.
I noticed that when the timer reaches the 1m the buff disappears from the list.
Since i wanted to analyse a bit more, i changed the display durations to mm:ss to track the issue a bit easier. When i tested again, with the same buff, i noticed that when the buff time reaches to 59 secs the icon of the buff disappears from the buff list in the upper right corner. i wasnt able to test with any other buff to be honest but i can give it a shot if it's needed.
Now, i'm not sure what happens
a) the buff duration it's expanded by 1 minute, it's not calculated correctly?
b) does only the icon disappears from the list incorrectly?