two simultaneously open user-card`s conflict with each other, the second one makes changes to first one (page order) for some unknown reason. the setting is not reactive, or kinda not reactive, activating property doesn't make all posts have color, however if user already has color applied then all posts will have color reactively changing on all posts except for... sometimes? although you can highlight yourself (by visiting your own profile) it breaks notifications a little bit. several options for post highlights
ability to see all definitions for highlighting
nested retweet layout/better retweet highlight handling?