Quests and Achievements appear fixed now on EU but Crafting Order favourites still reset whenever you relog
I guess you are right. We should be grateful that A) they noticed the bug, B) they recognised it as a bug, C) they considered it a bug worth fixing, D) they fixed it.
None of this is a given 
– Thank you, Blizz!
My quest lin in right side of screen is gon. tryed with no addons
As some have noted already this issue has now been fixed.
Thanks to everyone who helped bring attention to this!