Yes, and I can confirm that the devs do not understand that a higher priority should have been assigned to that issue. When I still played on live worlds, and as an alliance leader or founder in most cases, I used to have quite a number of multi-paged message threads each day - advising, answering questions or just lending my ear to players´ real life problems, while having diplomatic talks in other message threads, and of course coordinating attacks and defences or receiving battle reports in others.
We only noticed the issue on Beta so early, because it was/is so evident when the language and the topic of the conversation changed on page 2. But just imagine you have all message threads in the same language, and most of them containing battle reports, attack arrival times, etc - players will not even notice at first that the contents of the messages got mixed up when they use the faulty scrolling feature, and that will most likely result in some chaos.
I can only plead once again: Take your time and fix this issue before rolling it out on the live markets tomorrow. The game is all about communication, and even without any additional bugs the means of ingame-communication are conceived to be uncomfortably limited and inadequate, as the sheer number of ideas and suggestions regarding improvements of ingame messaging and alliance forums might prove. This bug will cause a lot of (avoidable) additional anger and discontent, as soon as the players will feel its negative impact.