This may be a core Aurora bug, not sure. Figured I'd report it (we don't have access to a vanilla Aurora instance at the moment)
The issue: When a particular reply is highlighted (because, for example, you came to it from a notification email - example link: https://community.khoros.com/discussions/technology/large-difference-between-thread-views-shown-on-site-vs-in-analytics---why/767101/replies/767402?emcs_t=S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufE0zWFk0NDM4RU5WMU9RfC0xfFNVQlNDUklQVElPTlN8aEs), the "like" button doesn't appear to work. It actually does work, but you can't tell.
See attached little video (which I am uploading as a gif because inline videos don't seem to be supported here(!!) - I also tried uploading the .mp4 as an attachment but that file extension isn't allowed. So, apologies for the annoying infinitely-playing gif. I tried.):
