Is it just me, or is the shop discount buff not lasting as long?

I had it yesterday and I didn't pay attention but it did seem like a long time later when it finally ran out.

Mine's been lasting several hours. How long is it /supposed/ to last? I just got it for quests a few minutes ago and it indicates that this is 6 hours, but is it, perhaps, variable?

Expires in 5 hours 53 minutes 39 seconds. I just got it a couple minutes ago so it's 6 hours.

Hmm, it just sees I get the buff, and then it runs out like, an hour later

If it just seems that way, you should take care to pay attention to that moving forward, in case it is a bug.

However, if you know for sure that it is that way, and can show that in a manner that the staff should know about it being an error, I would think a ticket or a thread in the problems and bugs forum may be a good idea.

Click on the buff icon next time you get it and check how much time you have left. If it's not 6 hours (or close to it), make a thread in Problems & Bugs