The ongoing Russia-Ukraine war has been extensively discussed on social media. One commonly observed problem in such discussions is the emergence of echo chambers, where users are rarely exposed to opinions outside their worldview. Prior literature on this topic has assumed that such users hold a single consistent view. However, recent work has revealed that complex topics (such as the war) often trigger bipartisanship among certain people. With this in mind, we study the presence of echo chambers on Twitter related to the Russo-Ukrainian war. We measure their presence and identify an important subset of bipartisan users who vary their opinions during the invasion. We explore the role they play in the communications graph and identify features that distinguish them from remaining users. We conclude by discussing their importance and how they can improve the quality of discourse surrounding the war.

翻译：俄乌战争持续在社交媒体上引发广泛讨论。其中一个常见的问题是回音室现象的出现，即用户很少接触到与自己世界观相左的观点。以往关于该主题的文献假设这类用户持有单一且一致的观点。然而，近期研究表明，复杂议题（如战争）往往会在某些人群中引发双重立场。基于此，本研究探讨了Twitter上与俄乌战争相关的回音室现象。我们通过测量其存在性，识别出一类重要的两派用户——他们在入侵过程中立场摇摆。我们探究了他们在传播网络中的作用，并找出其区别于其他用户的关键特征。最后，我们讨论了该类用户的重要性及其如何提升战争相关讨论的质量。