Sorry if I have missed it, but I don't remember having seen that issue on the forum.
I have played my 5 daily GW battles as usual and I have lost the 3rd one (the huge stats of the opponents on PC don't help...).
However here is how my attack screen looks:
It has happened twice to one of my guilmates last week.
The first time the 6th battle that has been added to him was a defeat that turned his score of the day into 4/1 instead of 5/0.
On both occasion, he has been allowed to play only 4 battles the following day.
Of course I have just submitted a ticket, hoping I will be able to play 5 battles tomorrow and not only 4.
But it is very annoying in a context where the victory for the week often depends of 1-2K points of difference.
Edit : Another of my guildmates has the same problem today.