Also it seems in one day I hit my Guild renown limit with the 3.0 multiplier, and was getting no renown end chest rewards. Until it reset last my local time. I'll have to calculate what that limit is, it seems to be total renown including the multiplier and not just the base renown.
I reported this too. The tweaking you did on Friday changed something
On Kyhber yesterday [my local time] was getting [renown + (renown * 3.0)] for any of my renown rewards. 6 Accounts are in my guild.